1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
3 Copyright (C) 1999-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
24 #include "floatformat.h"
27 #include "reggroups.h"
29 #include "frame-base.h"
30 #include "frame-unwind.h"
34 #include "elf/common.h" /* for DT_PLTGOT value */
39 #include "ia64-tdep.h"
42 #ifdef HAVE_LIBUNWIND_IA64_H
43 #include "elf/ia64.h" /* for PT_IA_64_UNWIND value */
44 #include "ia64-libunwind-tdep.h"
46 /* Note: KERNEL_START is supposed to be an address which is not going
47 to ever contain any valid unwind info. For ia64 linux, the choice
48 of 0xc000000000000000 is fairly safe since that's uncached space.
50 We use KERNEL_START as follows: after obtaining the kernel's
51 unwind table via getunwind(), we project its unwind data into
52 address-range KERNEL_START-(KERNEL_START+ktab_size) and then
53 when ia64_access_mem() sees a memory access to this
54 address-range, we redirect it to ktab instead.
56 None of this hackery is needed with a modern kernel/libcs
57 which uses the kernel virtual DSO to provide access to the
58 kernel's unwind info. In that case, ktab_size remains 0 and
59 hence the value of KERNEL_START doesn't matter. */
61 #define KERNEL_START 0xc000000000000000ULL
63 static size_t ktab_size = 0;
64 struct ia64_table_entry
66 uint64_t start_offset;
71 static struct ia64_table_entry *ktab = NULL;
75 /* An enumeration of the different IA-64 instruction types. */
77 typedef enum instruction_type
79 A, /* Integer ALU ; I-unit or M-unit */
80 I, /* Non-ALU integer; I-unit */
81 M, /* Memory ; M-unit */
82 F, /* Floating-point ; F-unit */
83 B, /* Branch ; B-unit */
84 L, /* Extended (L+X) ; I-unit */
85 X, /* Extended (L+X) ; I-unit */
86 undefined /* undefined or reserved */
89 /* We represent IA-64 PC addresses as the value of the instruction
90 pointer or'd with some bit combination in the low nibble which
91 represents the slot number in the bundle addressed by the
92 instruction pointer. The problem is that the Linux kernel
93 multiplies its slot numbers (for exceptions) by one while the
94 disassembler multiplies its slot numbers by 6. In addition, I've
95 heard it said that the simulator uses 1 as the multiplier.
97 I've fixed the disassembler so that the bytes_per_line field will
98 be the slot multiplier. If bytes_per_line comes in as zero, it
99 is set to six (which is how it was set up initially). -- objdump
100 displays pretty disassembly dumps with this value. For our purposes,
101 we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we
102 never want to also display the raw bytes the way objdump does. */
104 #define SLOT_MULTIPLIER 1
106 /* Length in bytes of an instruction bundle. */
108 #define BUNDLE_LEN 16
110 /* See the saved memory layout comment for ia64_memory_insert_breakpoint. */
112 #if BREAKPOINT_MAX < BUNDLE_LEN - 2
113 # error "BREAKPOINT_MAX < BUNDLE_LEN - 2"
116 static gdbarch_init_ftype ia64_gdbarch_init;
118 static gdbarch_register_name_ftype ia64_register_name;
119 static gdbarch_register_type_ftype ia64_register_type;
120 static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
121 static gdbarch_skip_prologue_ftype ia64_skip_prologue;
122 static struct type *is_float_or_hfa_type (struct type *t);
123 static CORE_ADDR ia64_find_global_pointer (struct gdbarch *gdbarch,
126 #define NUM_IA64_RAW_REGS 462
128 static int sp_regnum = IA64_GR12_REGNUM;
130 /* NOTE: we treat the register stack registers r32-r127 as
131 pseudo-registers because they may not be accessible via the ptrace
132 register get/set interfaces. */
134 enum pseudo_regs { FIRST_PSEUDO_REGNUM = NUM_IA64_RAW_REGS,
135 VBOF_REGNUM = IA64_NAT127_REGNUM + 1, V32_REGNUM,
136 V127_REGNUM = V32_REGNUM + 95,
137 VP0_REGNUM, VP16_REGNUM = VP0_REGNUM + 16,
138 VP63_REGNUM = VP0_REGNUM + 63, LAST_PSEUDO_REGNUM };
140 /* Array of register names; There should be ia64_num_regs strings in
143 static const char *ia64_register_names[] =
144 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
145 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
146 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
147 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
148 "", "", "", "", "", "", "", "",
149 "", "", "", "", "", "", "", "",
150 "", "", "", "", "", "", "", "",
151 "", "", "", "", "", "", "", "",
152 "", "", "", "", "", "", "", "",
153 "", "", "", "", "", "", "", "",
154 "", "", "", "", "", "", "", "",
155 "", "", "", "", "", "", "", "",
156 "", "", "", "", "", "", "", "",
157 "", "", "", "", "", "", "", "",
158 "", "", "", "", "", "", "", "",
159 "", "", "", "", "", "", "", "",
161 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
162 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
163 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
164 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
165 "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
166 "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
167 "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
168 "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
169 "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71",
170 "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79",
171 "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87",
172 "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95",
173 "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103",
174 "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111",
175 "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119",
176 "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127",
178 "", "", "", "", "", "", "", "",
179 "", "", "", "", "", "", "", "",
180 "", "", "", "", "", "", "", "",
181 "", "", "", "", "", "", "", "",
182 "", "", "", "", "", "", "", "",
183 "", "", "", "", "", "", "", "",
184 "", "", "", "", "", "", "", "",
185 "", "", "", "", "", "", "", "",
187 "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
191 "pr", "ip", "psr", "cfm",
193 "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7",
194 "", "", "", "", "", "", "", "",
195 "rsc", "bsp", "bspstore", "rnat",
197 "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "",
198 "ccv", "", "", "", "unat", "", "", "",
199 "fpsr", "", "", "", "itc",
200 "", "", "", "", "", "", "", "", "", "",
201 "", "", "", "", "", "", "", "", "",
203 "", "", "", "", "", "", "", "", "", "",
204 "", "", "", "", "", "", "", "", "", "",
205 "", "", "", "", "", "", "", "", "", "",
206 "", "", "", "", "", "", "", "", "", "",
207 "", "", "", "", "", "", "", "", "", "",
208 "", "", "", "", "", "", "", "", "", "",
210 "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7",
211 "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15",
212 "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23",
213 "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31",
214 "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39",
215 "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47",
216 "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55",
217 "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63",
218 "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71",
219 "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79",
220 "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87",
221 "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95",
222 "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103",
223 "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111",
224 "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119",
225 "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127",
229 "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
230 "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
231 "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
232 "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
233 "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71",
234 "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79",
235 "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87",
236 "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95",
237 "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103",
238 "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111",
239 "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119",
240 "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127",
242 "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7",
243 "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15",
244 "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23",
245 "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31",
246 "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39",
247 "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47",
248 "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55",
249 "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63",
252 struct ia64_frame_cache
254 CORE_ADDR base; /* frame pointer base for frame */
255 CORE_ADDR pc; /* function start pc for frame */
256 CORE_ADDR saved_sp; /* stack pointer for frame */
257 CORE_ADDR bsp; /* points at r32 for the current frame */
258 CORE_ADDR cfm; /* cfm value for current frame */
259 CORE_ADDR prev_cfm; /* cfm value for previous frame */
261 int sof; /* Size of frame (decoded from cfm value). */
262 int sol; /* Size of locals (decoded from cfm value). */
263 int sor; /* Number of rotating registers (decoded from
265 CORE_ADDR after_prologue;
266 /* Address of first instruction after the last
267 prologue instruction; Note that there may
268 be instructions from the function's body
269 intermingled with the prologue. */
270 int mem_stack_frame_size;
271 /* Size of the memory stack frame (may be zero),
272 or -1 if it has not been determined yet. */
273 int fp_reg; /* Register number (if any) used a frame pointer
274 for this frame. 0 if no register is being used
275 as the frame pointer. */
277 /* Saved registers. */
278 CORE_ADDR saved_regs[NUM_IA64_RAW_REGS];
283 floatformat_valid (const struct floatformat *fmt, const void *from)
288 static const struct floatformat floatformat_ia64_ext_little =
290 floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64,
291 floatformat_intbit_yes, "floatformat_ia64_ext_little", floatformat_valid, NULL
294 static const struct floatformat floatformat_ia64_ext_big =
296 floatformat_big, 82, 46, 47, 17, 65535, 0x1ffff, 64, 64,
297 floatformat_intbit_yes, "floatformat_ia64_ext_big", floatformat_valid
300 static const struct floatformat *floatformats_ia64_ext[2] =
302 &floatformat_ia64_ext_big,
303 &floatformat_ia64_ext_little
307 ia64_ext_type (struct gdbarch *gdbarch)
309 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
311 if (!tdep->ia64_ext_type)
313 = arch_float_type (gdbarch, 128, "builtin_type_ia64_ext",
314 floatformats_ia64_ext);
316 return tdep->ia64_ext_type;
320 ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
321 struct reggroup *group)
326 if (group == all_reggroup)
328 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
329 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
330 raw_p = regnum < NUM_IA64_RAW_REGS;
331 if (group == float_reggroup)
333 if (group == vector_reggroup)
335 if (group == general_reggroup)
336 return (!vector_p && !float_p);
337 if (group == save_reggroup || group == restore_reggroup)
343 ia64_register_name (struct gdbarch *gdbarch, int reg)
345 return ia64_register_names[reg];
349 ia64_register_type (struct gdbarch *arch, int reg)
351 if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM)
352 return ia64_ext_type (arch);
354 return builtin_type (arch)->builtin_long;
358 ia64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
360 if (reg >= IA64_GR32_REGNUM && reg <= IA64_GR127_REGNUM)
361 return V32_REGNUM + (reg - IA64_GR32_REGNUM);
366 /* Extract ``len'' bits from an instruction bundle starting at
370 extract_bit_field (const gdb_byte *bundle, int from, int len)
372 long long result = 0LL;
374 int from_byte = from / 8;
375 int to_byte = to / 8;
376 unsigned char *b = (unsigned char *) bundle;
382 if (from_byte == to_byte)
383 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
384 result = c >> (from % 8);
385 lshift = 8 - (from % 8);
387 for (i = from_byte+1; i < to_byte; i++)
389 result |= ((long long) b[i]) << lshift;
393 if (from_byte < to_byte && (to % 8 != 0))
396 c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8);
397 result |= ((long long) c) << lshift;
403 /* Replace the specified bits in an instruction bundle. */
406 replace_bit_field (gdb_byte *bundle, long long val, int from, int len)
409 int from_byte = from / 8;
410 int to_byte = to / 8;
411 unsigned char *b = (unsigned char *) bundle;
414 if (from_byte == to_byte)
416 unsigned char left, right;
418 left = (c >> (to % 8)) << (to % 8);
419 right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
420 c = (unsigned char) (val & 0xff);
421 c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8);
429 c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8);
430 c = c | (val << (from % 8));
432 val >>= 8 - from % 8;
434 for (i = from_byte+1; i < to_byte; i++)
443 unsigned char cv = (unsigned char) val;
445 c = c >> (to % 8) << (to % 8);
446 c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8);
452 /* Return the contents of slot N (for N = 0, 1, or 2) in
453 and instruction bundle. */
456 slotN_contents (gdb_byte *bundle, int slotnum)
458 return extract_bit_field (bundle, 5+41*slotnum, 41);
461 /* Store an instruction in an instruction bundle. */
464 replace_slotN_contents (gdb_byte *bundle, long long instr, int slotnum)
466 replace_bit_field (bundle, instr, 5+41*slotnum, 41);
469 static const enum instruction_type template_encoding_table[32][3] =
471 { M, I, I }, /* 00 */
472 { M, I, I }, /* 01 */
473 { M, I, I }, /* 02 */
474 { M, I, I }, /* 03 */
475 { M, L, X }, /* 04 */
476 { M, L, X }, /* 05 */
477 { undefined, undefined, undefined }, /* 06 */
478 { undefined, undefined, undefined }, /* 07 */
479 { M, M, I }, /* 08 */
480 { M, M, I }, /* 09 */
481 { M, M, I }, /* 0A */
482 { M, M, I }, /* 0B */
483 { M, F, I }, /* 0C */
484 { M, F, I }, /* 0D */
485 { M, M, F }, /* 0E */
486 { M, M, F }, /* 0F */
487 { M, I, B }, /* 10 */
488 { M, I, B }, /* 11 */
489 { M, B, B }, /* 12 */
490 { M, B, B }, /* 13 */
491 { undefined, undefined, undefined }, /* 14 */
492 { undefined, undefined, undefined }, /* 15 */
493 { B, B, B }, /* 16 */
494 { B, B, B }, /* 17 */
495 { M, M, B }, /* 18 */
496 { M, M, B }, /* 19 */
497 { undefined, undefined, undefined }, /* 1A */
498 { undefined, undefined, undefined }, /* 1B */
499 { M, F, B }, /* 1C */
500 { M, F, B }, /* 1D */
501 { undefined, undefined, undefined }, /* 1E */
502 { undefined, undefined, undefined }, /* 1F */
505 /* Fetch and (partially) decode an instruction at ADDR and return the
506 address of the next instruction to fetch. */
509 fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
511 gdb_byte bundle[BUNDLE_LEN];
512 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
516 /* Warn about slot numbers greater than 2. We used to generate
517 an error here on the assumption that the user entered an invalid
518 address. But, sometimes GDB itself requests an invalid address.
519 This can (easily) happen when execution stops in a function for
520 which there are no symbols. The prologue scanner will attempt to
521 find the beginning of the function - if the nearest symbol
522 happens to not be aligned on a bundle boundary (16 bytes), the
523 resulting starting address will cause GDB to think that the slot
526 So we warn about it and set the slot number to zero. It is
527 not necessarily a fatal condition, particularly if debugging
528 at the assembly language level. */
531 warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
532 "Using slot 0 instead"));
538 val = target_read_memory (addr, bundle, BUNDLE_LEN);
543 *instr = slotN_contents (bundle, slotnum);
544 templ = extract_bit_field (bundle, 0, 5);
545 *it = template_encoding_table[(int)templ][slotnum];
547 if (slotnum == 2 || (slotnum == 1 && *it == L))
550 addr += (slotnum + 1) * SLOT_MULTIPLIER;
555 /* There are 5 different break instructions (break.i, break.b,
556 break.m, break.f, and break.x), but they all have the same
557 encoding. (The five bit template in the low five bits of the
558 instruction bundle distinguishes one from another.)
560 The runtime architecture manual specifies that break instructions
561 used for debugging purposes must have the upper two bits of the 21
562 bit immediate set to a 0 and a 1 respectively. A breakpoint
563 instruction encodes the most significant bit of its 21 bit
564 immediate at bit 36 of the 41 bit instruction. The penultimate msb
565 is at bit 25 which leads to the pattern below.
567 Originally, I had this set up to do, e.g, a "break.i 0x80000" But
568 it turns out that 0x80000 was used as the syscall break in the early
569 simulators. So I changed the pattern slightly to do "break.i 0x080001"
570 instead. But that didn't work either (I later found out that this
571 pattern was used by the simulator that I was using.) So I ended up
572 using the pattern seen below.
574 SHADOW_CONTENTS has byte-based addressing (PLACED_ADDRESS and SHADOW_LEN)
575 while we need bit-based addressing as the instructions length is 41 bits and
576 we must not modify/corrupt the adjacent slots in the same bundle.
577 Fortunately we may store larger memory incl. the adjacent bits with the
578 original memory content (not the possibly already stored breakpoints there).
579 We need to be careful in ia64_memory_remove_breakpoint to always restore
580 only the specific bits of this instruction ignoring any adjacent stored
583 We use the original addressing with the low nibble in the range <0..2> which
584 gets incorrectly interpreted by generic non-ia64 breakpoint_restore_shadows
585 as the direct byte offset of SHADOW_CONTENTS. We store whole BUNDLE_LEN
586 bytes just without these two possibly skipped bytes to not to exceed to the
589 If we would like to store the whole bundle to SHADOW_CONTENTS we would have
590 to store already the base address (`address & ~0x0f') into PLACED_ADDRESS.
591 In such case there is no other place where to store
592 SLOTNUM (`adress & 0x0f', value in the range <0..2>). We need to know
593 SLOTNUM in ia64_memory_remove_breakpoint.
595 There is one special case where we need to be extra careful:
596 L-X instructions, which are instructions that occupy 2 slots
597 (The L part is always in slot 1, and the X part is always in
598 slot 2). We must refuse to insert breakpoints for an address
599 that points at slot 2 of a bundle where an L-X instruction is
600 present, since there is logically no instruction at that address.
601 However, to make things more interesting, the opcode of L-X
602 instructions is located in slot 2. This means that, to insert
603 a breakpoint at an address that points to slot 1, we actually
604 need to write the breakpoint in slot 2! Slot 1 is actually
605 the extended operand, so writing the breakpoint there would not
606 have the desired effect. Another side-effect of this issue
607 is that we need to make sure that the shadow contents buffer
608 does save byte 15 of our instruction bundle (this is the tail
609 end of slot 2, which wouldn't be saved if we were to insert
610 the breakpoint in slot 1).
612 ia64 16-byte bundle layout:
613 | 5 bits | slot 0 with 41 bits | slot 1 with 41 bits | slot 2 with 41 bits |
615 The current addressing used by the code below:
616 original PC placed_address placed_size required covered
617 == bp_tgt->shadow_len reqd \subset covered
618 0xABCDE0 0xABCDE0 0x10 <0x0...0x5> <0x0..0xF>
619 0xABCDE1 0xABCDE1 0xF <0x5...0xA> <0x1..0xF>
620 0xABCDE2 0xABCDE2 0xE <0xA...0xF> <0x2..0xF>
622 L-X instructions are treated a little specially, as explained above:
623 0xABCDE1 0xABCDE1 0xF <0xA...0xF> <0x1..0xF>
625 `objdump -d' and some other tools show a bit unjustified offsets:
626 original PC byte where starts the instruction objdump offset
627 0xABCDE0 0xABCDE0 0xABCDE0
628 0xABCDE1 0xABCDE5 0xABCDE6
629 0xABCDE2 0xABCDEA 0xABCDEC
632 #define IA64_BREAKPOINT 0x00003333300LL
635 ia64_memory_insert_breakpoint (struct gdbarch *gdbarch,
636 struct bp_target_info *bp_tgt)
638 CORE_ADDR addr = bp_tgt->placed_address = bp_tgt->reqstd_address;
639 gdb_byte bundle[BUNDLE_LEN];
640 int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
641 long long instr_breakpoint;
644 struct cleanup *cleanup;
647 error (_("Can't insert breakpoint for slot numbers greater than 2."));
651 /* Enable the automatic memory restoration from breakpoints while
652 we read our instruction bundle for the purpose of SHADOW_CONTENTS.
653 Otherwise, we could possibly store into the shadow parts of the adjacent
654 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
655 breakpoint instruction bits region. */
656 cleanup = make_show_memory_breakpoints_cleanup (0);
657 val = target_read_memory (addr, bundle, BUNDLE_LEN);
660 do_cleanups (cleanup);
664 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
665 for addressing the SHADOW_CONTENTS placement. */
666 shadow_slotnum = slotnum;
668 /* Always cover the last byte of the bundle in case we are inserting
669 a breakpoint on an L-X instruction. */
670 bp_tgt->shadow_len = BUNDLE_LEN - shadow_slotnum;
672 templ = extract_bit_field (bundle, 0, 5);
673 if (template_encoding_table[templ][slotnum] == X)
675 /* X unit types can only be used in slot 2, and are actually
676 part of a 2-slot L-X instruction. We cannot break at this
677 address, as this is the second half of an instruction that
678 lives in slot 1 of that bundle. */
679 gdb_assert (slotnum == 2);
680 error (_("Can't insert breakpoint for non-existing slot X"));
682 if (template_encoding_table[templ][slotnum] == L)
684 /* L unit types can only be used in slot 1. But the associated
685 opcode for that instruction is in slot 2, so bump the slot number
687 gdb_assert (slotnum == 1);
691 /* Store the whole bundle, except for the initial skipped bytes by the slot
692 number interpreted as bytes offset in PLACED_ADDRESS. */
693 memcpy (bp_tgt->shadow_contents, bundle + shadow_slotnum,
696 /* Re-read the same bundle as above except that, this time, read it in order
697 to compute the new bundle inside which we will be inserting the
698 breakpoint. Therefore, disable the automatic memory restoration from
699 breakpoints while we read our instruction bundle. Otherwise, the general
700 restoration mechanism kicks in and we would possibly remove parts of the
701 adjacent placed breakpoints. It is due to our SHADOW_CONTENTS overlapping
702 the real breakpoint instruction bits region. */
703 make_show_memory_breakpoints_cleanup (1);
704 val = target_read_memory (addr, bundle, BUNDLE_LEN);
707 do_cleanups (cleanup);
711 /* Breakpoints already present in the code will get deteacted and not get
712 reinserted by bp_loc_is_permanent. Multiple breakpoints at the same
713 location cannot induce the internal error as they are optimized into
714 a single instance by update_global_location_list. */
715 instr_breakpoint = slotN_contents (bundle, slotnum);
716 if (instr_breakpoint == IA64_BREAKPOINT)
717 internal_error (__FILE__, __LINE__,
718 _("Address %s already contains a breakpoint."),
719 paddress (gdbarch, bp_tgt->placed_address));
720 replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
722 val = target_write_memory (addr + shadow_slotnum, bundle + shadow_slotnum,
725 do_cleanups (cleanup);
730 ia64_memory_remove_breakpoint (struct gdbarch *gdbarch,
731 struct bp_target_info *bp_tgt)
733 CORE_ADDR addr = bp_tgt->placed_address;
734 gdb_byte bundle_mem[BUNDLE_LEN], bundle_saved[BUNDLE_LEN];
735 int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
736 long long instr_breakpoint, instr_saved;
739 struct cleanup *cleanup;
743 /* Disable the automatic memory restoration from breakpoints while
744 we read our instruction bundle. Otherwise, the general restoration
745 mechanism kicks in and we would possibly remove parts of the adjacent
746 placed breakpoints. It is due to our SHADOW_CONTENTS overlapping the real
747 breakpoint instruction bits region. */
748 cleanup = make_show_memory_breakpoints_cleanup (1);
749 val = target_read_memory (addr, bundle_mem, BUNDLE_LEN);
752 do_cleanups (cleanup);
756 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
757 for addressing the SHADOW_CONTENTS placement. */
758 shadow_slotnum = slotnum;
760 templ = extract_bit_field (bundle_mem, 0, 5);
761 if (template_encoding_table[templ][slotnum] == X)
763 /* X unit types can only be used in slot 2, and are actually
764 part of a 2-slot L-X instruction. We refuse to insert
765 breakpoints at this address, so there should be no reason
766 for us attempting to remove one there, except if the program's
767 code somehow got modified in memory. */
768 gdb_assert (slotnum == 2);
769 warning (_("Cannot remove breakpoint at address %s from non-existing "
770 "X-type slot, memory has changed underneath"),
771 paddress (gdbarch, bp_tgt->placed_address));
772 do_cleanups (cleanup);
775 if (template_encoding_table[templ][slotnum] == L)
777 /* L unit types can only be used in slot 1. But the breakpoint
778 was actually saved using slot 2, so update the slot number
780 gdb_assert (slotnum == 1);
784 gdb_assert (bp_tgt->shadow_len == BUNDLE_LEN - shadow_slotnum);
786 instr_breakpoint = slotN_contents (bundle_mem, slotnum);
787 if (instr_breakpoint != IA64_BREAKPOINT)
789 warning (_("Cannot remove breakpoint at address %s, "
790 "no break instruction at such address."),
791 paddress (gdbarch, bp_tgt->placed_address));
792 do_cleanups (cleanup);
796 /* Extract the original saved instruction from SLOTNUM normalizing its
797 bit-shift for INSTR_SAVED. */
798 memcpy (bundle_saved, bundle_mem, BUNDLE_LEN);
799 memcpy (bundle_saved + shadow_slotnum, bp_tgt->shadow_contents,
801 instr_saved = slotN_contents (bundle_saved, slotnum);
803 /* In BUNDLE_MEM, be careful to modify only the bits belonging to SLOTNUM
804 and not any of the other ones that are stored in SHADOW_CONTENTS. */
805 replace_slotN_contents (bundle_mem, instr_saved, slotnum);
806 val = target_write_raw_memory (addr, bundle_mem, BUNDLE_LEN);
808 do_cleanups (cleanup);
812 /* Implement the breakpoint_kind_from_pc gdbarch method. */
815 ia64_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
817 /* A place holder of gdbarch method breakpoint_kind_from_pc. */
821 /* As gdbarch_breakpoint_from_pc ranges have byte granularity and ia64
822 instruction slots ranges are bit-granular (41 bits) we have to provide an
823 extended range as described for ia64_memory_insert_breakpoint. We also take
824 care of preserving the `break' instruction 21-bit (or 62-bit) parameter to
825 make a match for permanent breakpoints. */
827 static const gdb_byte *
828 ia64_breakpoint_from_pc (struct gdbarch *gdbarch,
829 CORE_ADDR *pcptr, int *lenptr)
831 CORE_ADDR addr = *pcptr;
832 static gdb_byte bundle[BUNDLE_LEN];
833 int slotnum = (int) (*pcptr & 0x0f) / SLOT_MULTIPLIER, shadow_slotnum;
834 long long instr_fetched;
837 struct cleanup *cleanup;
840 error (_("Can't insert breakpoint for slot numbers greater than 2."));
844 /* Enable the automatic memory restoration from breakpoints while
845 we read our instruction bundle to match bp_loc_is_permanent. */
846 cleanup = make_show_memory_breakpoints_cleanup (0);
847 val = target_read_memory (addr, bundle, BUNDLE_LEN);
848 do_cleanups (cleanup);
850 /* The memory might be unreachable. This can happen, for instance,
851 when the user inserts a breakpoint at an invalid address. */
855 /* SHADOW_SLOTNUM saves the original slot number as expected by the caller
856 for addressing the SHADOW_CONTENTS placement. */
857 shadow_slotnum = slotnum;
859 /* Cover always the last byte of the bundle for the L-X slot case. */
860 *lenptr = BUNDLE_LEN - shadow_slotnum;
862 /* Check for L type instruction in slot 1, if present then bump up the slot
863 number to the slot 2. */
864 templ = extract_bit_field (bundle, 0, 5);
865 if (template_encoding_table[templ][slotnum] == X)
867 gdb_assert (slotnum == 2);
868 error (_("Can't insert breakpoint for non-existing slot X"));
870 if (template_encoding_table[templ][slotnum] == L)
872 gdb_assert (slotnum == 1);
876 /* A break instruction has its all its opcode bits cleared except for
877 the parameter value. For L+X slot pair we are at the X slot (slot 2) so
878 we should not touch the L slot - the upper 41 bits of the parameter. */
879 instr_fetched = slotN_contents (bundle, slotnum);
880 instr_fetched &= 0x1003ffffc0LL;
881 replace_slotN_contents (bundle, instr_fetched, slotnum);
883 return bundle + shadow_slotnum;
887 ia64_read_pc (struct regcache *regcache)
889 ULONGEST psr_value, pc_value;
892 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
893 regcache_cooked_read_unsigned (regcache, IA64_IP_REGNUM, &pc_value);
894 slot_num = (psr_value >> 41) & 3;
896 return pc_value | (slot_num * SLOT_MULTIPLIER);
900 ia64_write_pc (struct regcache *regcache, CORE_ADDR new_pc)
902 int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
905 regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr_value);
906 psr_value &= ~(3LL << 41);
907 psr_value |= (ULONGEST)(slot_num & 0x3) << 41;
911 regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr_value);
912 regcache_cooked_write_unsigned (regcache, IA64_IP_REGNUM, new_pc);
915 #define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f)
917 /* Returns the address of the slot that's NSLOTS slots away from
918 the address ADDR. NSLOTS may be positive or negative. */
920 rse_address_add(CORE_ADDR addr, int nslots)
923 int mandatory_nat_slots = nslots / 63;
924 int direction = nslots < 0 ? -1 : 1;
926 new_addr = addr + 8 * (nslots + mandatory_nat_slots);
928 if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9))
929 new_addr += 8 * direction;
931 if (IS_NaT_COLLECTION_ADDR(new_addr))
932 new_addr += 8 * direction;
937 static enum register_status
938 ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
939 int regnum, gdb_byte *buf)
941 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
942 enum register_status status;
944 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
946 #ifdef HAVE_LIBUNWIND_IA64_H
947 /* First try and use the libunwind special reg accessor,
948 otherwise fallback to standard logic. */
949 if (!libunwind_is_initialized ()
950 || libunwind_get_reg_special (gdbarch, regcache, regnum, buf) != 0)
953 /* The fallback position is to assume that r32-r127 are
954 found sequentially in memory starting at $bof. This
955 isn't always true, but without libunwind, this is the
957 enum register_status status;
962 status = regcache_cooked_read_unsigned (regcache,
963 IA64_BSP_REGNUM, &bsp);
964 if (status != REG_VALID)
967 status = regcache_cooked_read_unsigned (regcache,
968 IA64_CFM_REGNUM, &cfm);
969 if (status != REG_VALID)
972 /* The bsp points at the end of the register frame so we
973 subtract the size of frame from it to get start of
975 bsp = rse_address_add (bsp, -(cfm & 0x7f));
977 if ((cfm & 0x7f) > regnum - V32_REGNUM)
979 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
980 reg = read_memory_integer ((CORE_ADDR)reg_addr, 8, byte_order);
981 store_unsigned_integer (buf, register_size (gdbarch, regnum),
985 store_unsigned_integer (buf, register_size (gdbarch, regnum),
989 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
993 status = regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
994 if (status != REG_VALID)
996 unatN_val = (unat & (1LL << (regnum - IA64_NAT0_REGNUM))) != 0;
997 store_unsigned_integer (buf, register_size (gdbarch, regnum),
998 byte_order, unatN_val);
1000 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1002 ULONGEST natN_val = 0;
1005 CORE_ADDR gr_addr = 0;
1006 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1007 if (status != REG_VALID)
1009 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1010 if (status != REG_VALID)
1013 /* The bsp points at the end of the register frame so we
1014 subtract the size of frame from it to get start of register frame. */
1015 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1017 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1018 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1022 /* Compute address of nat collection bits. */
1023 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1024 CORE_ADDR nat_collection;
1026 /* If our nat collection address is bigger than bsp, we have to get
1027 the nat collection from rnat. Otherwise, we fetch the nat
1028 collection from the computed address. */
1029 if (nat_addr >= bsp)
1030 regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM,
1033 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1034 nat_bit = (gr_addr >> 3) & 0x3f;
1035 natN_val = (nat_collection >> nat_bit) & 1;
1038 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1039 byte_order, natN_val);
1041 else if (regnum == VBOF_REGNUM)
1043 /* A virtual register frame start is provided for user convenience.
1044 It can be calculated as the bsp - sof (sizeof frame). */
1047 status = regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1048 if (status != REG_VALID)
1050 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1051 if (status != REG_VALID)
1054 /* The bsp points at the end of the register frame so we
1055 subtract the size of frame from it to get beginning of frame. */
1056 vbsp = rse_address_add (bsp, -(cfm & 0x7f));
1057 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1060 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1065 status = regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1066 if (status != REG_VALID)
1068 status = regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1069 if (status != REG_VALID)
1072 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1074 /* Fetch predicate register rename base from current frame
1075 marker for this frame. */
1076 int rrb_pr = (cfm >> 32) & 0x3f;
1078 /* Adjust the register number to account for register rotation. */
1079 regnum = VP16_REGNUM
1080 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1082 prN_val = (pr & (1LL << (regnum - VP0_REGNUM))) != 0;
1083 store_unsigned_integer (buf, register_size (gdbarch, regnum),
1084 byte_order, prN_val);
1087 memset (buf, 0, register_size (gdbarch, regnum));
1093 ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
1094 int regnum, const gdb_byte *buf)
1096 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1098 if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
1102 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1103 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1105 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1107 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1109 ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1110 write_memory (reg_addr, buf, 8);
1113 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
1115 ULONGEST unatN_val, unat, unatN_mask;
1116 regcache_cooked_read_unsigned (regcache, IA64_UNAT_REGNUM, &unat);
1117 unatN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1120 unatN_mask = (1LL << (regnum - IA64_NAT0_REGNUM));
1122 unat &= ~unatN_mask;
1123 else if (unatN_val == 1)
1125 regcache_cooked_write_unsigned (regcache, IA64_UNAT_REGNUM, unat);
1127 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
1132 CORE_ADDR gr_addr = 0;
1133 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
1134 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1136 /* The bsp points at the end of the register frame so we
1137 subtract the size of frame from it to get start of register frame. */
1138 bsp = rse_address_add (bsp, -(cfm & 0x7f));
1140 if ((cfm & 0x7f) > regnum - V32_REGNUM)
1141 gr_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
1143 natN_val = extract_unsigned_integer (buf, register_size (gdbarch,
1147 if (gr_addr != 0 && (natN_val == 0 || natN_val == 1))
1149 /* Compute address of nat collection bits. */
1150 CORE_ADDR nat_addr = gr_addr | 0x1f8;
1151 CORE_ADDR nat_collection;
1152 int natN_bit = (gr_addr >> 3) & 0x3f;
1153 ULONGEST natN_mask = (1LL << natN_bit);
1154 /* If our nat collection address is bigger than bsp, we have to get
1155 the nat collection from rnat. Otherwise, we fetch the nat
1156 collection from the computed address. */
1157 if (nat_addr >= bsp)
1159 regcache_cooked_read_unsigned (regcache,
1163 nat_collection |= natN_mask;
1165 nat_collection &= ~natN_mask;
1166 regcache_cooked_write_unsigned (regcache, IA64_RNAT_REGNUM,
1171 gdb_byte nat_buf[8];
1172 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
1174 nat_collection |= natN_mask;
1176 nat_collection &= ~natN_mask;
1177 store_unsigned_integer (nat_buf, register_size (gdbarch, regnum),
1178 byte_order, nat_collection);
1179 write_memory (nat_addr, nat_buf, 8);
1183 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1190 regcache_cooked_read_unsigned (regcache, IA64_PR_REGNUM, &pr);
1191 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
1193 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1195 /* Fetch predicate register rename base from current frame
1196 marker for this frame. */
1197 int rrb_pr = (cfm >> 32) & 0x3f;
1199 /* Adjust the register number to account for register rotation. */
1200 regnum = VP16_REGNUM
1201 + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1203 prN_val = extract_unsigned_integer (buf, register_size (gdbarch, regnum),
1205 prN_mask = (1LL << (regnum - VP0_REGNUM));
1208 else if (prN_val == 1)
1210 regcache_cooked_write_unsigned (regcache, IA64_PR_REGNUM, pr);
1214 /* The ia64 needs to convert between various ieee floating-point formats
1215 and the special ia64 floating point register format. */
1218 ia64_convert_register_p (struct gdbarch *gdbarch, int regno, struct type *type)
1220 return (regno >= IA64_FR0_REGNUM && regno <= IA64_FR127_REGNUM
1221 && type != ia64_ext_type (gdbarch));
1225 ia64_register_to_value (struct frame_info *frame, int regnum,
1226 struct type *valtype, gdb_byte *out,
1227 int *optimizedp, int *unavailablep)
1229 struct gdbarch *gdbarch = get_frame_arch (frame);
1230 gdb_byte in[MAX_REGISTER_SIZE];
1232 /* Convert to TYPE. */
1233 if (!get_frame_register_bytes (frame, regnum, 0,
1234 register_size (gdbarch, regnum),
1235 in, optimizedp, unavailablep))
1238 convert_typed_floating (in, ia64_ext_type (gdbarch), out, valtype);
1239 *optimizedp = *unavailablep = 0;
1244 ia64_value_to_register (struct frame_info *frame, int regnum,
1245 struct type *valtype, const gdb_byte *in)
1247 struct gdbarch *gdbarch = get_frame_arch (frame);
1248 gdb_byte out[MAX_REGISTER_SIZE];
1249 convert_typed_floating (in, valtype, out, ia64_ext_type (gdbarch));
1250 put_frame_register (frame, regnum, out);
1254 /* Limit the number of skipped non-prologue instructions since examining
1255 of the prologue is expensive. */
1256 static int max_skip_non_prologue_insns = 40;
1258 /* Given PC representing the starting address of a function, and
1259 LIM_PC which is the (sloppy) limit to which to scan when looking
1260 for a prologue, attempt to further refine this limit by using
1261 the line data in the symbol table. If successful, a better guess
1262 on where the prologue ends is returned, otherwise the previous
1263 value of lim_pc is returned. TRUST_LIMIT is a pointer to a flag
1264 which will be set to indicate whether the returned limit may be
1265 used with no further scanning in the event that the function is
1268 /* FIXME: cagney/2004-02-14: This function and logic have largely been
1269 superseded by skip_prologue_using_sal. */
1272 refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit)
1274 struct symtab_and_line prologue_sal;
1275 CORE_ADDR start_pc = pc;
1278 /* The prologue can not possibly go past the function end itself,
1279 so we can already adjust LIM_PC accordingly. */
1280 if (find_pc_partial_function (pc, NULL, NULL, &end_pc) && end_pc < lim_pc)
1283 /* Start off not trusting the limit. */
1286 prologue_sal = find_pc_line (pc, 0);
1287 if (prologue_sal.line != 0)
1290 CORE_ADDR addr = prologue_sal.end;
1292 /* Handle the case in which compiler's optimizer/scheduler
1293 has moved instructions into the prologue. We scan ahead
1294 in the function looking for address ranges whose corresponding
1295 line number is less than or equal to the first one that we
1296 found for the function. (It can be less than when the
1297 scheduler puts a body instruction before the first prologue
1299 for (i = 2 * max_skip_non_prologue_insns;
1300 i > 0 && (lim_pc == 0 || addr < lim_pc);
1303 struct symtab_and_line sal;
1305 sal = find_pc_line (addr, 0);
1308 if (sal.line <= prologue_sal.line
1309 && sal.symtab == prologue_sal.symtab)
1316 if (lim_pc == 0 || prologue_sal.end < lim_pc)
1318 lim_pc = prologue_sal.end;
1319 if (start_pc == get_pc_function_start (lim_pc))
1326 #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \
1327 || (8 <= (_regnum_) && (_regnum_) <= 11) \
1328 || (14 <= (_regnum_) && (_regnum_) <= 31))
1329 #define imm9(_instr_) \
1330 ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \
1331 | (((_instr_) & 0x00008000000LL) >> 20) \
1332 | (((_instr_) & 0x00000001fc0LL) >> 6))
1334 /* Allocate and initialize a frame cache. */
1336 static struct ia64_frame_cache *
1337 ia64_alloc_frame_cache (void)
1339 struct ia64_frame_cache *cache;
1342 cache = FRAME_OBSTACK_ZALLOC (struct ia64_frame_cache);
1348 cache->prev_cfm = 0;
1354 cache->frameless = 1;
1356 for (i = 0; i < NUM_IA64_RAW_REGS; i++)
1357 cache->saved_regs[i] = 0;
1363 examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc,
1364 struct frame_info *this_frame,
1365 struct ia64_frame_cache *cache)
1368 CORE_ADDR last_prologue_pc = pc;
1369 instruction_type it;
1374 int unat_save_reg = 0;
1375 int pr_save_reg = 0;
1376 int mem_stack_frame_size = 0;
1378 CORE_ADDR spill_addr = 0;
1381 char reg_contents[256];
1387 CORE_ADDR bof, sor, sol, sof, cfm, rrb_gr;
1389 memset (instores, 0, sizeof instores);
1390 memset (infpstores, 0, sizeof infpstores);
1391 memset (reg_contents, 0, sizeof reg_contents);
1393 if (cache->after_prologue != 0
1394 && cache->after_prologue <= lim_pc)
1395 return cache->after_prologue;
1397 lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit);
1398 next_pc = fetch_instruction (pc, &it, &instr);
1400 /* We want to check if we have a recognizable function start before we
1401 look ahead for a prologue. */
1402 if (pc < lim_pc && next_pc
1403 && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL))
1405 /* alloc - start of a regular function. */
1406 int sol = (int) ((instr & 0x00007f00000LL) >> 20);
1407 int sof = (int) ((instr & 0x000000fe000LL) >> 13);
1408 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1410 /* Verify that the current cfm matches what we think is the
1411 function start. If we have somehow jumped within a function,
1412 we do not want to interpret the prologue and calculate the
1413 addresses of various registers such as the return address.
1414 We will instead treat the frame as frameless. */
1416 (sof == (cache->cfm & 0x7f) &&
1417 sol == ((cache->cfm >> 7) & 0x7f)))
1421 last_prologue_pc = next_pc;
1426 /* Look for a leaf routine. */
1427 if (pc < lim_pc && next_pc
1428 && (it == I || it == M)
1429 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1431 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1432 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1433 | ((instr & 0x001f8000000LL) >> 20)
1434 | ((instr & 0x000000fe000LL) >> 13));
1435 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1436 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1437 int qp = (int) (instr & 0x0000000003fLL);
1438 if (qp == 0 && rN == 2 && imm == 0 && rM == 12 && fp_reg == 0)
1440 /* mov r2, r12 - beginning of leaf routine. */
1442 last_prologue_pc = next_pc;
1446 /* If we don't recognize a regular function or leaf routine, we are
1452 last_prologue_pc = lim_pc;
1456 /* Loop, looking for prologue instructions, keeping track of
1457 where preserved registers were spilled. */
1460 next_pc = fetch_instruction (pc, &it, &instr);
1464 if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
1466 /* Exit loop upon hitting a non-nop branch instruction. */
1471 else if (((instr & 0x3fLL) != 0LL) &&
1472 (frameless || ret_reg != 0))
1474 /* Exit loop upon hitting a predicated instruction if
1475 we already have the return register or if we are frameless. */
1480 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL))
1483 int b2 = (int) ((instr & 0x0000000e000LL) >> 13);
1484 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1485 int qp = (int) (instr & 0x0000000003f);
1487 if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0)
1490 last_prologue_pc = next_pc;
1493 else if ((it == I || it == M)
1494 && ((instr & 0x1ee00000000LL) == 0x10800000000LL))
1496 /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */
1497 int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13)
1498 | ((instr & 0x001f8000000LL) >> 20)
1499 | ((instr & 0x000000fe000LL) >> 13));
1500 int rM = (int) ((instr & 0x00007f00000LL) >> 20);
1501 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1502 int qp = (int) (instr & 0x0000000003fLL);
1504 if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0)
1508 last_prologue_pc = next_pc;
1510 else if (qp == 0 && rN == 12 && rM == 12)
1512 /* adds r12, -mem_stack_frame_size, r12 */
1513 mem_stack_frame_size -= imm;
1514 last_prologue_pc = next_pc;
1516 else if (qp == 0 && rN == 2
1517 && ((rM == fp_reg && fp_reg != 0) || rM == 12))
1519 gdb_byte buf[MAX_REGISTER_SIZE];
1520 CORE_ADDR saved_sp = 0;
1521 /* adds r2, spilloffset, rFramePointer
1523 adds r2, spilloffset, r12
1525 Get ready for stf.spill or st8.spill instructions.
1526 The address to start spilling at is loaded into r2.
1527 FIXME: Why r2? That's what gcc currently uses; it
1528 could well be different for other compilers. */
1530 /* Hmm... whether or not this will work will depend on
1531 where the pc is. If it's still early in the prologue
1532 this'll be wrong. FIXME */
1535 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1536 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1537 get_frame_register (this_frame, sp_regnum, buf);
1538 saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1540 spill_addr = saved_sp
1541 + (rM == 12 ? 0 : mem_stack_frame_size)
1544 last_prologue_pc = next_pc;
1546 else if (qp == 0 && rM >= 32 && rM < 40 && !instores[rM-32] &&
1547 rN < 256 && imm == 0)
1549 /* mov rN, rM where rM is an input register. */
1550 reg_contents[rN] = rM;
1551 last_prologue_pc = next_pc;
1553 else if (frameless && qp == 0 && rN == fp_reg && imm == 0 &&
1557 last_prologue_pc = next_pc;
1562 && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1563 || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) ))
1565 /* stf.spill [rN] = fM, imm9
1567 stf.spill [rN] = fM */
1569 int imm = imm9(instr);
1570 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1571 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1572 int qp = (int) (instr & 0x0000000003fLL);
1573 if (qp == 0 && rN == spill_reg && spill_addr != 0
1574 && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31)))
1576 cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
1578 if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
1581 spill_addr = 0; /* last one; must be done. */
1582 last_prologue_pc = next_pc;
1585 else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL))
1586 || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) )
1592 int arM = (int) ((instr & 0x00007f00000LL) >> 20);
1593 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1594 int qp = (int) (instr & 0x0000000003fLL);
1595 if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */)
1597 /* We have something like "mov.m r3 = ar.unat". Remember the
1598 r3 (or whatever) and watch for a store of this register... */
1600 last_prologue_pc = next_pc;
1603 else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL))
1606 int rN = (int) ((instr & 0x00000001fc0LL) >> 6);
1607 int qp = (int) (instr & 0x0000000003fLL);
1608 if (qp == 0 && isScratch (rN))
1611 last_prologue_pc = next_pc;
1615 && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL)
1616 || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)))
1620 st8 [rN] = rM, imm9 */
1621 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1622 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1623 int qp = (int) (instr & 0x0000000003fLL);
1624 int indirect = rM < 256 ? reg_contents[rM] : 0;
1625 if (qp == 0 && rN == spill_reg && spill_addr != 0
1626 && (rM == unat_save_reg || rM == pr_save_reg))
1628 /* We've found a spill of either the UNAT register or the PR
1629 register. (Well, not exactly; what we've actually found is
1630 a spill of the register that UNAT or PR was moved to).
1631 Record that fact and move on... */
1632 if (rM == unat_save_reg)
1634 /* Track UNAT register. */
1635 cache->saved_regs[IA64_UNAT_REGNUM] = spill_addr;
1640 /* Track PR register. */
1641 cache->saved_regs[IA64_PR_REGNUM] = spill_addr;
1644 if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL)
1645 /* st8 [rN] = rM, imm9 */
1646 spill_addr += imm9(instr);
1648 spill_addr = 0; /* Must be done spilling. */
1649 last_prologue_pc = next_pc;
1651 else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1653 /* Allow up to one store of each input register. */
1654 instores[rM-32] = 1;
1655 last_prologue_pc = next_pc;
1657 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1658 !instores[indirect-32])
1660 /* Allow an indirect store of an input register. */
1661 instores[indirect-32] = 1;
1662 last_prologue_pc = next_pc;
1665 else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL))
1672 Note that the st8 case is handled in the clause above.
1674 Advance over stores of input registers. One store per input
1675 register is permitted. */
1676 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1677 int qp = (int) (instr & 0x0000000003fLL);
1678 int indirect = rM < 256 ? reg_contents[rM] : 0;
1679 if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32])
1681 instores[rM-32] = 1;
1682 last_prologue_pc = next_pc;
1684 else if (qp == 0 && 32 <= indirect && indirect < 40 &&
1685 !instores[indirect-32])
1687 /* Allow an indirect store of an input register. */
1688 instores[indirect-32] = 1;
1689 last_prologue_pc = next_pc;
1692 else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL))
1699 Advance over stores of floating point input registers. Again
1700 one store per register is permitted. */
1701 int fM = (int) ((instr & 0x000000fe000LL) >> 13);
1702 int qp = (int) (instr & 0x0000000003fLL);
1703 if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8])
1705 infpstores[fM-8] = 1;
1706 last_prologue_pc = next_pc;
1710 && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL)
1711 || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)))
1713 /* st8.spill [rN] = rM
1715 st8.spill [rN] = rM, imm9 */
1716 int rN = (int) ((instr & 0x00007f00000LL) >> 20);
1717 int rM = (int) ((instr & 0x000000fe000LL) >> 13);
1718 int qp = (int) (instr & 0x0000000003fLL);
1719 if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7)
1721 /* We've found a spill of one of the preserved general purpose
1722 regs. Record the spill address and advance the spill
1723 register if appropriate. */
1724 cache->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr;
1725 if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL)
1726 /* st8.spill [rN] = rM, imm9 */
1727 spill_addr += imm9(instr);
1729 spill_addr = 0; /* Done spilling. */
1730 last_prologue_pc = next_pc;
1737 /* If not frameless and we aren't called by skip_prologue, then we need
1738 to calculate registers for the previous frame which will be needed
1741 if (!frameless && this_frame)
1743 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1744 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1746 /* Extract the size of the rotating portion of the stack
1747 frame and the register rename base from the current
1753 rrb_gr = (cfm >> 18) & 0x7f;
1755 /* Find the bof (beginning of frame). */
1756 bof = rse_address_add (cache->bsp, -sof);
1758 for (i = 0, addr = bof;
1762 if (IS_NaT_COLLECTION_ADDR (addr))
1766 if (i+32 == cfm_reg)
1767 cache->saved_regs[IA64_CFM_REGNUM] = addr;
1768 if (i+32 == ret_reg)
1769 cache->saved_regs[IA64_VRAP_REGNUM] = addr;
1771 cache->saved_regs[IA64_VFP_REGNUM] = addr;
1774 /* For the previous argument registers we require the previous bof.
1775 If we can't find the previous cfm, then we can do nothing. */
1777 if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
1779 cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM],
1782 else if (cfm_reg != 0)
1784 get_frame_register (this_frame, cfm_reg, buf);
1785 cfm = extract_unsigned_integer (buf, 8, byte_order);
1787 cache->prev_cfm = cfm;
1791 sor = ((cfm >> 14) & 0xf) * 8;
1793 sol = (cfm >> 7) & 0x7f;
1794 rrb_gr = (cfm >> 18) & 0x7f;
1796 /* The previous bof only requires subtraction of the sol (size of
1797 locals) due to the overlap between output and input of
1798 subsequent frames. */
1799 bof = rse_address_add (bof, -sol);
1801 for (i = 0, addr = bof;
1805 if (IS_NaT_COLLECTION_ADDR (addr))
1810 cache->saved_regs[IA64_GR32_REGNUM
1811 + ((i + (sor - rrb_gr)) % sor)]
1814 cache->saved_regs[IA64_GR32_REGNUM + i] = addr;
1820 /* Try and trust the lim_pc value whenever possible. */
1821 if (trust_limit && lim_pc >= last_prologue_pc)
1822 last_prologue_pc = lim_pc;
1824 cache->frameless = frameless;
1825 cache->after_prologue = last_prologue_pc;
1826 cache->mem_stack_frame_size = mem_stack_frame_size;
1827 cache->fp_reg = fp_reg;
1829 return last_prologue_pc;
1833 ia64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
1835 struct ia64_frame_cache cache;
1837 cache.after_prologue = 0;
1841 /* Call examine_prologue with - as third argument since we don't
1842 have a next frame pointer to send. */
1843 return examine_prologue (pc, pc+1024, 0, &cache);
1847 /* Normal frames. */
1849 static struct ia64_frame_cache *
1850 ia64_frame_cache (struct frame_info *this_frame, void **this_cache)
1852 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1853 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1854 struct ia64_frame_cache *cache;
1859 return (struct ia64_frame_cache *) *this_cache;
1861 cache = ia64_alloc_frame_cache ();
1862 *this_cache = cache;
1864 get_frame_register (this_frame, sp_regnum, buf);
1865 cache->saved_sp = extract_unsigned_integer (buf, 8, byte_order);
1867 /* We always want the bsp to point to the end of frame.
1868 This way, we can always get the beginning of frame (bof)
1869 by subtracting frame size. */
1870 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
1871 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
1873 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
1875 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
1876 cfm = extract_unsigned_integer (buf, 8, byte_order);
1878 cache->sof = (cfm & 0x7f);
1879 cache->sol = (cfm >> 7) & 0x7f;
1880 cache->sor = ((cfm >> 14) & 0xf) * 8;
1884 cache->pc = get_frame_func (this_frame);
1887 examine_prologue (cache->pc, get_frame_pc (this_frame), this_frame, cache);
1889 cache->base = cache->saved_sp + cache->mem_stack_frame_size;
1895 ia64_frame_this_id (struct frame_info *this_frame, void **this_cache,
1896 struct frame_id *this_id)
1898 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1899 struct ia64_frame_cache *cache =
1900 ia64_frame_cache (this_frame, this_cache);
1902 /* If outermost frame, mark with null frame id. */
1903 if (cache->base != 0)
1904 (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
1905 if (gdbarch_debug >= 1)
1906 fprintf_unfiltered (gdb_stdlog,
1907 "regular frame id: code %s, stack %s, "
1908 "special %s, this_frame %s\n",
1909 paddress (gdbarch, this_id->code_addr),
1910 paddress (gdbarch, this_id->stack_addr),
1911 paddress (gdbarch, cache->bsp),
1912 host_address_to_string (this_frame));
1915 static struct value *
1916 ia64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
1919 struct gdbarch *gdbarch = get_frame_arch (this_frame);
1920 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1921 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
1924 gdb_assert (regnum >= 0);
1926 if (!target_has_registers)
1927 error (_("No registers."));
1929 if (regnum == gdbarch_sp_regnum (gdbarch))
1930 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1932 else if (regnum == IA64_BSP_REGNUM)
1935 CORE_ADDR prev_cfm, bsp, prev_bsp;
1937 /* We want to calculate the previous bsp as the end of the previous
1938 register stack frame. This corresponds to what the hardware bsp
1939 register will be if we pop the frame back which is why we might
1940 have been called. We know the beginning of the current frame is
1941 cache->bsp - cache->sof. This value in the previous frame points
1942 to the start of the output registers. We can calculate the end of
1943 that frame by adding the size of output:
1944 (sof (size of frame) - sol (size of locals)). */
1945 val = ia64_frame_prev_register (this_frame, this_cache, IA64_CFM_REGNUM);
1946 prev_cfm = extract_unsigned_integer (value_contents_all (val),
1948 bsp = rse_address_add (cache->bsp, -(cache->sof));
1950 rse_address_add (bsp, (prev_cfm & 0x7f) - ((prev_cfm >> 7) & 0x7f));
1952 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
1955 else if (regnum == IA64_CFM_REGNUM)
1957 CORE_ADDR addr = cache->saved_regs[IA64_CFM_REGNUM];
1960 return frame_unwind_got_memory (this_frame, regnum, addr);
1962 if (cache->prev_cfm)
1963 return frame_unwind_got_constant (this_frame, regnum, cache->prev_cfm);
1965 if (cache->frameless)
1966 return frame_unwind_got_register (this_frame, IA64_PFS_REGNUM,
1968 return frame_unwind_got_register (this_frame, regnum, 0);
1971 else if (regnum == IA64_VFP_REGNUM)
1973 /* If the function in question uses an automatic register (r32-r127)
1974 for the frame pointer, it'll be found by ia64_find_saved_register()
1975 above. If the function lacks one of these frame pointers, we can
1976 still provide a value since we know the size of the frame. */
1977 return frame_unwind_got_constant (this_frame, regnum, cache->base);
1980 else if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
1982 struct value *pr_val;
1985 pr_val = ia64_frame_prev_register (this_frame, this_cache,
1987 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
1989 /* Fetch predicate register rename base from current frame
1990 marker for this frame. */
1991 int rrb_pr = (cache->cfm >> 32) & 0x3f;
1993 /* Adjust the register number to account for register rotation. */
1994 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
1996 prN = extract_bit_field (value_contents_all (pr_val),
1997 regnum - VP0_REGNUM, 1);
1998 return frame_unwind_got_constant (this_frame, regnum, prN);
2001 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
2003 struct value *unat_val;
2005 unat_val = ia64_frame_prev_register (this_frame, this_cache,
2007 unatN = extract_bit_field (value_contents_all (unat_val),
2008 regnum - IA64_NAT0_REGNUM, 1);
2009 return frame_unwind_got_constant (this_frame, regnum, unatN);
2012 else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2015 /* Find address of general register corresponding to nat bit we're
2019 gr_addr = cache->saved_regs[regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM];
2023 /* Compute address of nat collection bits. */
2024 CORE_ADDR nat_addr = gr_addr | 0x1f8;
2026 CORE_ADDR nat_collection;
2029 /* If our nat collection address is bigger than bsp, we have to get
2030 the nat collection from rnat. Otherwise, we fetch the nat
2031 collection from the computed address. */
2032 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2033 bsp = extract_unsigned_integer (buf, 8, byte_order);
2034 if (nat_addr >= bsp)
2036 get_frame_register (this_frame, IA64_RNAT_REGNUM, buf);
2037 nat_collection = extract_unsigned_integer (buf, 8, byte_order);
2040 nat_collection = read_memory_integer (nat_addr, 8, byte_order);
2041 nat_bit = (gr_addr >> 3) & 0x3f;
2042 natval = (nat_collection >> nat_bit) & 1;
2045 return frame_unwind_got_constant (this_frame, regnum, natval);
2048 else if (regnum == IA64_IP_REGNUM)
2051 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2055 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2056 pc = extract_unsigned_integer (buf, 8, byte_order);
2058 else if (cache->frameless)
2060 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2061 pc = extract_unsigned_integer (buf, 8, byte_order);
2064 return frame_unwind_got_constant (this_frame, regnum, pc);
2067 else if (regnum == IA64_PSR_REGNUM)
2069 /* We don't know how to get the complete previous PSR, but we need it
2070 for the slot information when we unwind the pc (pc is formed of IP
2071 register plus slot information from PSR). To get the previous
2072 slot information, we mask it off the return address. */
2073 ULONGEST slot_num = 0;
2076 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2078 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2079 psr = extract_unsigned_integer (buf, 8, byte_order);
2083 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2084 pc = extract_unsigned_integer (buf, 8, byte_order);
2086 else if (cache->frameless)
2088 get_frame_register (this_frame, IA64_BR0_REGNUM, buf);
2089 pc = extract_unsigned_integer (buf, 8, byte_order);
2091 psr &= ~(3LL << 41);
2092 slot_num = pc & 0x3LL;
2093 psr |= (CORE_ADDR)slot_num << 41;
2094 return frame_unwind_got_constant (this_frame, regnum, psr);
2097 else if (regnum == IA64_BR0_REGNUM)
2099 CORE_ADDR addr = cache->saved_regs[IA64_BR0_REGNUM];
2102 return frame_unwind_got_memory (this_frame, regnum, addr);
2104 return frame_unwind_got_constant (this_frame, regnum, 0);
2107 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2108 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2112 if (regnum >= V32_REGNUM)
2113 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2114 addr = cache->saved_regs[regnum];
2116 return frame_unwind_got_memory (this_frame, regnum, addr);
2118 if (cache->frameless)
2120 struct value *reg_val;
2121 CORE_ADDR prev_cfm, prev_bsp, prev_bof;
2123 /* FIXME: brobecker/2008-05-01: Doesn't this seem redundant
2124 with the same code above? */
2125 if (regnum >= V32_REGNUM)
2126 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2127 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2129 prev_cfm = extract_unsigned_integer (value_contents_all (reg_val),
2131 reg_val = ia64_frame_prev_register (this_frame, this_cache,
2133 prev_bsp = extract_unsigned_integer (value_contents_all (reg_val),
2135 prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
2137 addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
2138 return frame_unwind_got_memory (this_frame, regnum, addr);
2141 return frame_unwind_got_constant (this_frame, regnum, 0);
2144 else /* All other registers. */
2148 if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM)
2150 /* Fetch floating point register rename base from current
2151 frame marker for this frame. */
2152 int rrb_fr = (cache->cfm >> 25) & 0x7f;
2154 /* Adjust the floating point register number to account for
2155 register rotation. */
2156 regnum = IA64_FR32_REGNUM
2157 + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96;
2160 /* If we have stored a memory address, access the register. */
2161 addr = cache->saved_regs[regnum];
2163 return frame_unwind_got_memory (this_frame, regnum, addr);
2164 /* Otherwise, punt and get the current value of the register. */
2166 return frame_unwind_got_register (this_frame, regnum, regnum);
2170 static const struct frame_unwind ia64_frame_unwind =
2173 default_frame_unwind_stop_reason,
2174 &ia64_frame_this_id,
2175 &ia64_frame_prev_register,
2177 default_frame_sniffer
2180 /* Signal trampolines. */
2183 ia64_sigtramp_frame_init_saved_regs (struct frame_info *this_frame,
2184 struct ia64_frame_cache *cache)
2186 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2187 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2189 if (tdep->sigcontext_register_address)
2193 cache->saved_regs[IA64_VRAP_REGNUM]
2194 = tdep->sigcontext_register_address (gdbarch, cache->base,
2196 cache->saved_regs[IA64_CFM_REGNUM]
2197 = tdep->sigcontext_register_address (gdbarch, cache->base,
2199 cache->saved_regs[IA64_PSR_REGNUM]
2200 = tdep->sigcontext_register_address (gdbarch, cache->base,
2202 cache->saved_regs[IA64_BSP_REGNUM]
2203 = tdep->sigcontext_register_address (gdbarch, cache->base,
2205 cache->saved_regs[IA64_RNAT_REGNUM]
2206 = tdep->sigcontext_register_address (gdbarch, cache->base,
2208 cache->saved_regs[IA64_CCV_REGNUM]
2209 = tdep->sigcontext_register_address (gdbarch, cache->base,
2211 cache->saved_regs[IA64_UNAT_REGNUM]
2212 = tdep->sigcontext_register_address (gdbarch, cache->base,
2214 cache->saved_regs[IA64_FPSR_REGNUM]
2215 = tdep->sigcontext_register_address (gdbarch, cache->base,
2217 cache->saved_regs[IA64_PFS_REGNUM]
2218 = tdep->sigcontext_register_address (gdbarch, cache->base,
2220 cache->saved_regs[IA64_LC_REGNUM]
2221 = tdep->sigcontext_register_address (gdbarch, cache->base,
2224 for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++)
2225 cache->saved_regs[regno] =
2226 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2227 for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++)
2228 cache->saved_regs[regno] =
2229 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2230 for (regno = IA64_FR2_REGNUM; regno <= IA64_FR31_REGNUM; regno++)
2231 cache->saved_regs[regno] =
2232 tdep->sigcontext_register_address (gdbarch, cache->base, regno);
2236 static struct ia64_frame_cache *
2237 ia64_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
2239 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2240 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2241 struct ia64_frame_cache *cache;
2245 return (struct ia64_frame_cache *) *this_cache;
2247 cache = ia64_alloc_frame_cache ();
2249 get_frame_register (this_frame, sp_regnum, buf);
2250 /* Note that frame size is hard-coded below. We cannot calculate it
2251 via prologue examination. */
2252 cache->base = extract_unsigned_integer (buf, 8, byte_order) + 16;
2254 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2255 cache->bsp = extract_unsigned_integer (buf, 8, byte_order);
2257 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2258 cache->cfm = extract_unsigned_integer (buf, 8, byte_order);
2259 cache->sof = cache->cfm & 0x7f;
2261 ia64_sigtramp_frame_init_saved_regs (this_frame, cache);
2263 *this_cache = cache;
2268 ia64_sigtramp_frame_this_id (struct frame_info *this_frame,
2269 void **this_cache, struct frame_id *this_id)
2271 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2272 struct ia64_frame_cache *cache =
2273 ia64_sigtramp_frame_cache (this_frame, this_cache);
2275 (*this_id) = frame_id_build_special (cache->base,
2276 get_frame_pc (this_frame),
2278 if (gdbarch_debug >= 1)
2279 fprintf_unfiltered (gdb_stdlog,
2280 "sigtramp frame id: code %s, stack %s, "
2281 "special %s, this_frame %s\n",
2282 paddress (gdbarch, this_id->code_addr),
2283 paddress (gdbarch, this_id->stack_addr),
2284 paddress (gdbarch, cache->bsp),
2285 host_address_to_string (this_frame));
2288 static struct value *
2289 ia64_sigtramp_frame_prev_register (struct frame_info *this_frame,
2290 void **this_cache, int regnum)
2292 gdb_byte buf[MAX_REGISTER_SIZE];
2294 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2295 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2296 struct ia64_frame_cache *cache =
2297 ia64_sigtramp_frame_cache (this_frame, this_cache);
2299 gdb_assert (regnum >= 0);
2301 if (!target_has_registers)
2302 error (_("No registers."));
2304 if (regnum == IA64_IP_REGNUM)
2307 CORE_ADDR addr = cache->saved_regs[IA64_VRAP_REGNUM];
2311 read_memory (addr, buf, register_size (gdbarch, IA64_IP_REGNUM));
2312 pc = extract_unsigned_integer (buf, 8, byte_order);
2315 return frame_unwind_got_constant (this_frame, regnum, pc);
2318 else if ((regnum >= IA64_GR32_REGNUM && regnum <= IA64_GR127_REGNUM)
2319 || (regnum >= V32_REGNUM && regnum <= V127_REGNUM))
2323 if (regnum >= V32_REGNUM)
2324 regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
2325 addr = cache->saved_regs[regnum];
2327 return frame_unwind_got_memory (this_frame, regnum, addr);
2329 return frame_unwind_got_constant (this_frame, regnum, 0);
2332 else /* All other registers not listed above. */
2334 CORE_ADDR addr = cache->saved_regs[regnum];
2337 return frame_unwind_got_memory (this_frame, regnum, addr);
2339 return frame_unwind_got_constant (this_frame, regnum, 0);
2344 ia64_sigtramp_frame_sniffer (const struct frame_unwind *self,
2345 struct frame_info *this_frame,
2348 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
2349 if (tdep->pc_in_sigtramp)
2351 CORE_ADDR pc = get_frame_pc (this_frame);
2353 if (tdep->pc_in_sigtramp (pc))
2360 static const struct frame_unwind ia64_sigtramp_frame_unwind =
2363 default_frame_unwind_stop_reason,
2364 ia64_sigtramp_frame_this_id,
2365 ia64_sigtramp_frame_prev_register,
2367 ia64_sigtramp_frame_sniffer
2373 ia64_frame_base_address (struct frame_info *this_frame, void **this_cache)
2375 struct ia64_frame_cache *cache = ia64_frame_cache (this_frame, this_cache);
2380 static const struct frame_base ia64_frame_base =
2383 ia64_frame_base_address,
2384 ia64_frame_base_address,
2385 ia64_frame_base_address
2388 #ifdef HAVE_LIBUNWIND_IA64_H
2390 struct ia64_unwind_table_entry
2392 unw_word_t start_offset;
2393 unw_word_t end_offset;
2394 unw_word_t info_offset;
2397 static __inline__ uint64_t
2398 ia64_rse_slot_num (uint64_t addr)
2400 return (addr >> 3) & 0x3f;
2403 /* Skip over a designated number of registers in the backing
2404 store, remembering every 64th position is for NAT. */
2405 static __inline__ uint64_t
2406 ia64_rse_skip_regs (uint64_t addr, long num_regs)
2408 long delta = ia64_rse_slot_num(addr) + num_regs;
2412 return addr + ((num_regs + delta/0x3f) << 3);
2415 /* Gdb ia64-libunwind-tdep callback function to convert from an ia64 gdb
2416 register number to a libunwind register number. */
2418 ia64_gdb2uw_regnum (int regnum)
2420 if (regnum == sp_regnum)
2422 else if (regnum == IA64_BSP_REGNUM)
2423 return UNW_IA64_BSP;
2424 else if ((unsigned) (regnum - IA64_GR0_REGNUM) < 128)
2425 return UNW_IA64_GR + (regnum - IA64_GR0_REGNUM);
2426 else if ((unsigned) (regnum - V32_REGNUM) < 95)
2427 return UNW_IA64_GR + 32 + (regnum - V32_REGNUM);
2428 else if ((unsigned) (regnum - IA64_FR0_REGNUM) < 128)
2429 return UNW_IA64_FR + (regnum - IA64_FR0_REGNUM);
2430 else if ((unsigned) (regnum - IA64_PR0_REGNUM) < 64)
2432 else if ((unsigned) (regnum - IA64_BR0_REGNUM) < 8)
2433 return UNW_IA64_BR + (regnum - IA64_BR0_REGNUM);
2434 else if (regnum == IA64_PR_REGNUM)
2436 else if (regnum == IA64_IP_REGNUM)
2438 else if (regnum == IA64_CFM_REGNUM)
2439 return UNW_IA64_CFM;
2440 else if ((unsigned) (regnum - IA64_AR0_REGNUM) < 128)
2441 return UNW_IA64_AR + (regnum - IA64_AR0_REGNUM);
2442 else if ((unsigned) (regnum - IA64_NAT0_REGNUM) < 128)
2443 return UNW_IA64_NAT + (regnum - IA64_NAT0_REGNUM);
2448 /* Gdb ia64-libunwind-tdep callback function to convert from a libunwind
2449 register number to a ia64 gdb register number. */
2451 ia64_uw2gdb_regnum (int uw_regnum)
2453 if (uw_regnum == UNW_IA64_SP)
2455 else if (uw_regnum == UNW_IA64_BSP)
2456 return IA64_BSP_REGNUM;
2457 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 32)
2458 return IA64_GR0_REGNUM + (uw_regnum - UNW_IA64_GR);
2459 else if ((unsigned) (uw_regnum - UNW_IA64_GR) < 128)
2460 return V32_REGNUM + (uw_regnum - (IA64_GR0_REGNUM + 32));
2461 else if ((unsigned) (uw_regnum - UNW_IA64_FR) < 128)
2462 return IA64_FR0_REGNUM + (uw_regnum - UNW_IA64_FR);
2463 else if ((unsigned) (uw_regnum - UNW_IA64_BR) < 8)
2464 return IA64_BR0_REGNUM + (uw_regnum - UNW_IA64_BR);
2465 else if (uw_regnum == UNW_IA64_PR)
2466 return IA64_PR_REGNUM;
2467 else if (uw_regnum == UNW_REG_IP)
2468 return IA64_IP_REGNUM;
2469 else if (uw_regnum == UNW_IA64_CFM)
2470 return IA64_CFM_REGNUM;
2471 else if ((unsigned) (uw_regnum - UNW_IA64_AR) < 128)
2472 return IA64_AR0_REGNUM + (uw_regnum - UNW_IA64_AR);
2473 else if ((unsigned) (uw_regnum - UNW_IA64_NAT) < 128)
2474 return IA64_NAT0_REGNUM + (uw_regnum - UNW_IA64_NAT);
2479 /* Gdb ia64-libunwind-tdep callback function to reveal if register is
2480 a float register or not. */
2482 ia64_is_fpreg (int uw_regnum)
2484 return unw_is_fpreg (uw_regnum);
2487 /* Libunwind callback accessor function for general registers. */
2489 ia64_access_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
2490 int write, void *arg)
2492 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2493 unw_word_t bsp, sof, sol, cfm, psr, ip;
2494 struct frame_info *this_frame = (struct frame_info *) arg;
2495 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2496 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2497 long new_sof, old_sof;
2498 gdb_byte buf[MAX_REGISTER_SIZE];
2500 /* We never call any libunwind routines that need to write registers. */
2501 gdb_assert (!write);
2506 /* Libunwind expects to see the pc value which means the slot number
2507 from the psr must be merged with the ip word address. */
2508 get_frame_register (this_frame, IA64_IP_REGNUM, buf);
2509 ip = extract_unsigned_integer (buf, 8, byte_order);
2510 get_frame_register (this_frame, IA64_PSR_REGNUM, buf);
2511 psr = extract_unsigned_integer (buf, 8, byte_order);
2512 *val = ip | ((psr >> 41) & 0x3);
2515 case UNW_IA64_AR_BSP:
2516 /* Libunwind expects to see the beginning of the current
2517 register frame so we must account for the fact that
2518 ptrace() will return a value for bsp that points *after*
2519 the current register frame. */
2520 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2521 bsp = extract_unsigned_integer (buf, 8, byte_order);
2522 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2523 cfm = extract_unsigned_integer (buf, 8, byte_order);
2524 sof = gdbarch_tdep (gdbarch)->size_of_register_frame (this_frame, cfm);
2525 *val = ia64_rse_skip_regs (bsp, -sof);
2528 case UNW_IA64_AR_BSPSTORE:
2529 /* Libunwind wants bspstore to be after the current register frame.
2530 This is what ptrace() and gdb treats as the regular bsp value. */
2531 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2532 *val = extract_unsigned_integer (buf, 8, byte_order);
2536 /* For all other registers, just unwind the value directly. */
2537 get_frame_register (this_frame, regnum, buf);
2538 *val = extract_unsigned_integer (buf, 8, byte_order);
2542 if (gdbarch_debug >= 1)
2543 fprintf_unfiltered (gdb_stdlog,
2544 " access_reg: from cache: %4s=%s\n",
2545 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2546 ? ia64_register_names[regnum] : "r??"),
2547 paddress (gdbarch, *val));
2551 /* Libunwind callback accessor function for floating-point registers. */
2553 ia64_access_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2554 unw_fpreg_t *val, int write, void *arg)
2556 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2557 struct frame_info *this_frame = (struct frame_info *) arg;
2559 /* We never call any libunwind routines that need to write registers. */
2560 gdb_assert (!write);
2562 get_frame_register (this_frame, regnum, (gdb_byte *) val);
2567 /* Libunwind callback accessor function for top-level rse registers. */
2569 ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2570 unw_word_t *val, int write, void *arg)
2572 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2573 unw_word_t bsp, sof, sol, cfm, psr, ip;
2574 struct regcache *regcache = (struct regcache *) arg;
2575 struct gdbarch *gdbarch = get_regcache_arch (regcache);
2576 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2577 long new_sof, old_sof;
2578 gdb_byte buf[MAX_REGISTER_SIZE];
2580 /* We never call any libunwind routines that need to write registers. */
2581 gdb_assert (!write);
2586 /* Libunwind expects to see the pc value which means the slot number
2587 from the psr must be merged with the ip word address. */
2588 regcache_cooked_read (regcache, IA64_IP_REGNUM, buf);
2589 ip = extract_unsigned_integer (buf, 8, byte_order);
2590 regcache_cooked_read (regcache, IA64_PSR_REGNUM, buf);
2591 psr = extract_unsigned_integer (buf, 8, byte_order);
2592 *val = ip | ((psr >> 41) & 0x3);
2595 case UNW_IA64_AR_BSP:
2596 /* Libunwind expects to see the beginning of the current
2597 register frame so we must account for the fact that
2598 ptrace() will return a value for bsp that points *after*
2599 the current register frame. */
2600 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2601 bsp = extract_unsigned_integer (buf, 8, byte_order);
2602 regcache_cooked_read (regcache, IA64_CFM_REGNUM, buf);
2603 cfm = extract_unsigned_integer (buf, 8, byte_order);
2605 *val = ia64_rse_skip_regs (bsp, -sof);
2608 case UNW_IA64_AR_BSPSTORE:
2609 /* Libunwind wants bspstore to be after the current register frame.
2610 This is what ptrace() and gdb treats as the regular bsp value. */
2611 regcache_cooked_read (regcache, IA64_BSP_REGNUM, buf);
2612 *val = extract_unsigned_integer (buf, 8, byte_order);
2616 /* For all other registers, just unwind the value directly. */
2617 regcache_cooked_read (regcache, regnum, buf);
2618 *val = extract_unsigned_integer (buf, 8, byte_order);
2622 if (gdbarch_debug >= 1)
2623 fprintf_unfiltered (gdb_stdlog,
2624 " access_rse_reg: from cache: %4s=%s\n",
2625 (((unsigned) regnum <= IA64_NAT127_REGNUM)
2626 ? ia64_register_names[regnum] : "r??"),
2627 paddress (gdbarch, *val));
2632 /* Libunwind callback accessor function for top-level fp registers. */
2634 ia64_access_rse_fpreg (unw_addr_space_t as, unw_regnum_t uw_regnum,
2635 unw_fpreg_t *val, int write, void *arg)
2637 int regnum = ia64_uw2gdb_regnum (uw_regnum);
2638 struct regcache *regcache = (struct regcache *) arg;
2640 /* We never call any libunwind routines that need to write registers. */
2641 gdb_assert (!write);
2643 regcache_cooked_read (regcache, regnum, (gdb_byte *) val);
2648 /* Libunwind callback accessor function for accessing memory. */
2650 ia64_access_mem (unw_addr_space_t as,
2651 unw_word_t addr, unw_word_t *val,
2652 int write, void *arg)
2654 if (addr - KERNEL_START < ktab_size)
2656 unw_word_t *laddr = (unw_word_t*) ((char *) ktab
2657 + (addr - KERNEL_START));
2666 /* XXX do we need to normalize byte-order here? */
2668 return target_write_memory (addr, (gdb_byte *) val, sizeof (unw_word_t));
2670 return target_read_memory (addr, (gdb_byte *) val, sizeof (unw_word_t));
2673 /* Call low-level function to access the kernel unwind table. */
2675 getunwind_table (gdb_byte **buf_p)
2679 /* FIXME drow/2005-09-10: This code used to call
2680 ia64_linux_xfer_unwind_table directly to fetch the unwind table
2681 for the currently running ia64-linux kernel. That data should
2682 come from the core file and be accessed via the auxv vector; if
2683 we want to preserve fall back to the running kernel's table, then
2684 we should find a way to override the corefile layer's
2685 xfer_partial method. */
2687 x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
2693 /* Get the kernel unwind table. */
2695 get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
2697 static struct ia64_table_entry *etab;
2704 size = getunwind_table (&ktab_buf);
2706 return -UNW_ENOINFO;
2708 ktab = (struct ia64_table_entry *) ktab_buf;
2711 for (etab = ktab; etab->start_offset; ++etab)
2712 etab->info_offset += KERNEL_START;
2715 if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
2716 return -UNW_ENOINFO;
2718 di->format = UNW_INFO_FORMAT_TABLE;
2720 di->start_ip = ktab[0].start_offset;
2721 di->end_ip = etab[-1].end_offset;
2722 di->u.ti.name_ptr = (unw_word_t) "<kernel>";
2723 di->u.ti.segbase = 0;
2724 di->u.ti.table_len = ((char *) etab - (char *) ktab) / sizeof (unw_word_t);
2725 di->u.ti.table_data = (unw_word_t *) ktab;
2727 if (gdbarch_debug >= 1)
2728 fprintf_unfiltered (gdb_stdlog, "get_kernel_table: found table `%s': "
2729 "segbase=%s, length=%s, gp=%s\n",
2730 (char *) di->u.ti.name_ptr,
2731 hex_string (di->u.ti.segbase),
2732 pulongest (di->u.ti.table_len),
2733 hex_string (di->gp));
2737 /* Find the unwind table entry for a specified address. */
2739 ia64_find_unwind_table (struct objfile *objfile, unw_word_t ip,
2740 unw_dyn_info_t *dip, void **buf)
2742 Elf_Internal_Phdr *phdr, *p_text = NULL, *p_unwind = NULL;
2743 Elf_Internal_Ehdr *ehdr;
2744 unw_word_t segbase = 0;
2745 CORE_ADDR load_base;
2749 bfd = objfile->obfd;
2751 ehdr = elf_tdata (bfd)->elf_header;
2752 phdr = elf_tdata (bfd)->phdr;
2754 load_base = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2756 for (i = 0; i < ehdr->e_phnum; ++i)
2758 switch (phdr[i].p_type)
2761 if ((unw_word_t) (ip - load_base - phdr[i].p_vaddr)
2766 case PT_IA_64_UNWIND:
2767 p_unwind = phdr + i;
2775 if (!p_text || !p_unwind)
2776 return -UNW_ENOINFO;
2778 /* Verify that the segment that contains the IP also contains
2779 the static unwind table. If not, we may be in the Linux kernel's
2780 DSO gate page in which case the unwind table is another segment.
2781 Otherwise, we are dealing with runtime-generated code, for which we
2782 have no info here. */
2783 segbase = p_text->p_vaddr + load_base;
2785 if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
2788 for (i = 0; i < ehdr->e_phnum; ++i)
2790 if (phdr[i].p_type == PT_LOAD
2791 && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
2794 /* Get the segbase from the section containing the
2796 segbase = phdr[i].p_vaddr + load_base;
2800 return -UNW_ENOINFO;
2803 dip->start_ip = p_text->p_vaddr + load_base;
2804 dip->end_ip = dip->start_ip + p_text->p_memsz;
2805 dip->gp = ia64_find_global_pointer (get_objfile_arch (objfile), ip);
2806 dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
2807 dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
2808 dip->u.rti.segbase = segbase;
2809 dip->u.rti.table_len = p_unwind->p_memsz / sizeof (unw_word_t);
2810 dip->u.rti.table_data = p_unwind->p_vaddr + load_base;
2815 /* Libunwind callback accessor function to acquire procedure unwind-info. */
2817 ia64_find_proc_info_x (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
2818 int need_unwind_info, void *arg)
2820 struct obj_section *sec = find_pc_section (ip);
2827 /* XXX This only works if the host and the target architecture are
2828 both ia64 and if the have (more or less) the same kernel
2830 if (get_kernel_table (ip, &di) < 0)
2831 return -UNW_ENOINFO;
2833 if (gdbarch_debug >= 1)
2834 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2835 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2836 "length=%s,data=%s)\n",
2837 hex_string (ip), (char *)di.u.ti.name_ptr,
2838 hex_string (di.u.ti.segbase),
2839 hex_string (di.start_ip), hex_string (di.end_ip),
2841 pulongest (di.u.ti.table_len),
2842 hex_string ((CORE_ADDR)di.u.ti.table_data));
2846 ret = ia64_find_unwind_table (sec->objfile, ip, &di, &buf);
2850 if (gdbarch_debug >= 1)
2851 fprintf_unfiltered (gdb_stdlog, "ia64_find_proc_info_x: %s -> "
2852 "(name=`%s',segbase=%s,start=%s,end=%s,gp=%s,"
2853 "length=%s,data=%s)\n",
2854 hex_string (ip), (char *)di.u.rti.name_ptr,
2855 hex_string (di.u.rti.segbase),
2856 hex_string (di.start_ip), hex_string (di.end_ip),
2858 pulongest (di.u.rti.table_len),
2859 hex_string (di.u.rti.table_data));
2862 ret = libunwind_search_unwind_table (&as, ip, &di, pi, need_unwind_info,
2865 /* We no longer need the dyn info storage so free it. */
2871 /* Libunwind callback accessor function for cleanup. */
2873 ia64_put_unwind_info (unw_addr_space_t as,
2874 unw_proc_info_t *pip, void *arg)
2876 /* Nothing required for now. */
2879 /* Libunwind callback accessor function to get head of the dynamic
2880 unwind-info registration list. */
2882 ia64_get_dyn_info_list (unw_addr_space_t as,
2883 unw_word_t *dilap, void *arg)
2885 struct obj_section *text_sec;
2886 struct objfile *objfile;
2887 unw_word_t ip, addr;
2891 if (!libunwind_is_initialized ())
2892 return -UNW_ENOINFO;
2894 for (objfile = object_files; objfile; objfile = objfile->next)
2898 text_sec = objfile->sections + SECT_OFF_TEXT (objfile);
2899 ip = obj_section_addr (text_sec);
2900 ret = ia64_find_unwind_table (objfile, ip, &di, &buf);
2903 addr = libunwind_find_dyn_list (as, &di, arg);
2904 /* We no longer need the dyn info storage so free it. */
2909 if (gdbarch_debug >= 1)
2910 fprintf_unfiltered (gdb_stdlog,
2911 "dynamic unwind table in objfile %s "
2913 bfd_get_filename (objfile->obfd),
2914 hex_string (addr), hex_string (di.gp));
2920 return -UNW_ENOINFO;
2924 /* Frame interface functions for libunwind. */
2927 ia64_libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
2928 struct frame_id *this_id)
2930 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2931 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2932 struct frame_id id = outer_frame_id;
2936 libunwind_frame_this_id (this_frame, this_cache, &id);
2937 if (frame_id_eq (id, outer_frame_id))
2939 (*this_id) = outer_frame_id;
2943 /* We must add the bsp as the special address for frame comparison
2945 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
2946 bsp = extract_unsigned_integer (buf, 8, byte_order);
2948 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
2950 if (gdbarch_debug >= 1)
2951 fprintf_unfiltered (gdb_stdlog,
2952 "libunwind frame id: code %s, stack %s, "
2953 "special %s, this_frame %s\n",
2954 paddress (gdbarch, id.code_addr),
2955 paddress (gdbarch, id.stack_addr),
2956 paddress (gdbarch, bsp),
2957 host_address_to_string (this_frame));
2960 static struct value *
2961 ia64_libunwind_frame_prev_register (struct frame_info *this_frame,
2962 void **this_cache, int regnum)
2965 struct gdbarch *gdbarch = get_frame_arch (this_frame);
2966 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2969 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2970 reg = IA64_PR_REGNUM;
2971 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
2972 reg = IA64_UNAT_REGNUM;
2974 /* Let libunwind do most of the work. */
2975 val = libunwind_frame_prev_register (this_frame, this_cache, reg);
2977 if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
2981 if (VP16_REGNUM <= regnum && regnum <= VP63_REGNUM)
2985 gdb_byte buf[MAX_REGISTER_SIZE];
2987 /* Fetch predicate register rename base from current frame
2988 marker for this frame. */
2989 get_frame_register (this_frame, IA64_CFM_REGNUM, buf);
2990 cfm = extract_unsigned_integer (buf, 8, byte_order);
2991 rrb_pr = (cfm >> 32) & 0x3f;
2993 /* Adjust the register number to account for register rotation. */
2994 regnum = VP16_REGNUM + ((regnum - VP16_REGNUM) + rrb_pr) % 48;
2996 prN_val = extract_bit_field (value_contents_all (val),
2997 regnum - VP0_REGNUM, 1);
2998 return frame_unwind_got_constant (this_frame, regnum, prN_val);
3001 else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM)
3005 unatN_val = extract_bit_field (value_contents_all (val),
3006 regnum - IA64_NAT0_REGNUM, 1);
3007 return frame_unwind_got_constant (this_frame, regnum, unatN_val);
3010 else if (regnum == IA64_BSP_REGNUM)
3012 struct value *cfm_val;
3013 CORE_ADDR prev_bsp, prev_cfm;
3015 /* We want to calculate the previous bsp as the end of the previous
3016 register stack frame. This corresponds to what the hardware bsp
3017 register will be if we pop the frame back which is why we might
3018 have been called. We know that libunwind will pass us back the
3019 beginning of the current frame so we should just add sof to it. */
3020 prev_bsp = extract_unsigned_integer (value_contents_all (val),
3022 cfm_val = libunwind_frame_prev_register (this_frame, this_cache,
3024 prev_cfm = extract_unsigned_integer (value_contents_all (cfm_val),
3026 prev_bsp = rse_address_add (prev_bsp, (prev_cfm & 0x7f));
3028 return frame_unwind_got_constant (this_frame, regnum, prev_bsp);
3035 ia64_libunwind_frame_sniffer (const struct frame_unwind *self,
3036 struct frame_info *this_frame,
3039 if (libunwind_is_initialized ()
3040 && libunwind_frame_sniffer (self, this_frame, this_cache))
3046 static const struct frame_unwind ia64_libunwind_frame_unwind =
3049 default_frame_unwind_stop_reason,
3050 ia64_libunwind_frame_this_id,
3051 ia64_libunwind_frame_prev_register,
3053 ia64_libunwind_frame_sniffer,
3054 libunwind_frame_dealloc_cache
3058 ia64_libunwind_sigtramp_frame_this_id (struct frame_info *this_frame,
3060 struct frame_id *this_id)
3062 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3063 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3066 struct frame_id id = outer_frame_id;
3069 libunwind_frame_this_id (this_frame, this_cache, &id);
3070 if (frame_id_eq (id, outer_frame_id))
3072 (*this_id) = outer_frame_id;
3076 /* We must add the bsp as the special address for frame comparison
3078 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3079 bsp = extract_unsigned_integer (buf, 8, byte_order);
3081 /* For a sigtramp frame, we don't make the check for previous ip being 0. */
3082 (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
3084 if (gdbarch_debug >= 1)
3085 fprintf_unfiltered (gdb_stdlog,
3086 "libunwind sigtramp frame id: code %s, "
3087 "stack %s, special %s, this_frame %s\n",
3088 paddress (gdbarch, id.code_addr),
3089 paddress (gdbarch, id.stack_addr),
3090 paddress (gdbarch, bsp),
3091 host_address_to_string (this_frame));
3094 static struct value *
3095 ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *this_frame,
3096 void **this_cache, int regnum)
3098 struct gdbarch *gdbarch = get_frame_arch (this_frame);
3099 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3100 struct value *prev_ip_val;
3103 /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
3104 method of getting previous registers. */
3105 prev_ip_val = libunwind_frame_prev_register (this_frame, this_cache,
3107 prev_ip = extract_unsigned_integer (value_contents_all (prev_ip_val),
3112 void *tmp_cache = NULL;
3113 return ia64_sigtramp_frame_prev_register (this_frame, &tmp_cache,
3117 return ia64_libunwind_frame_prev_register (this_frame, this_cache, regnum);
3121 ia64_libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
3122 struct frame_info *this_frame,
3125 if (libunwind_is_initialized ())
3127 if (libunwind_sigtramp_frame_sniffer (self, this_frame, this_cache))
3132 return ia64_sigtramp_frame_sniffer (self, this_frame, this_cache);
3135 static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
3138 default_frame_unwind_stop_reason,
3139 ia64_libunwind_sigtramp_frame_this_id,
3140 ia64_libunwind_sigtramp_frame_prev_register,
3142 ia64_libunwind_sigtramp_frame_sniffer
3145 /* Set of libunwind callback acccessor functions. */
3146 unw_accessors_t ia64_unw_accessors =
3148 ia64_find_proc_info_x,
3149 ia64_put_unwind_info,
3150 ia64_get_dyn_info_list,
3158 /* Set of special libunwind callback acccessor functions specific for accessing
3159 the rse registers. At the top of the stack, we want libunwind to figure out
3160 how to read r32 - r127. Though usually they are found sequentially in
3161 memory starting from $bof, this is not always true. */
3162 unw_accessors_t ia64_unw_rse_accessors =
3164 ia64_find_proc_info_x,
3165 ia64_put_unwind_info,
3166 ia64_get_dyn_info_list,
3168 ia64_access_rse_reg,
3169 ia64_access_rse_fpreg,
3174 /* Set of ia64-libunwind-tdep gdb callbacks and data for generic
3175 ia64-libunwind-tdep code to use. */
3176 struct libunwind_descr ia64_libunwind_descr =
3181 &ia64_unw_accessors,
3182 &ia64_unw_rse_accessors,
3185 #endif /* HAVE_LIBUNWIND_IA64_H */
3188 ia64_use_struct_convention (struct type *type)
3190 struct type *float_elt_type;
3192 /* Don't use the struct convention for anything but structure,
3193 union, or array types. */
3194 if (!(TYPE_CODE (type) == TYPE_CODE_STRUCT
3195 || TYPE_CODE (type) == TYPE_CODE_UNION
3196 || TYPE_CODE (type) == TYPE_CODE_ARRAY))
3199 /* HFAs are structures (or arrays) consisting entirely of floating
3200 point values of the same length. Up to 8 of these are returned
3201 in registers. Don't use the struct convention when this is the
3203 float_elt_type = is_float_or_hfa_type (type);
3204 if (float_elt_type != NULL
3205 && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8)
3208 /* Other structs of length 32 or less are returned in r8-r11.
3209 Don't use the struct convention for those either. */
3210 return TYPE_LENGTH (type) > 32;
3213 /* Return non-zero if TYPE is a structure or union type. */
3216 ia64_struct_type_p (const struct type *type)
3218 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
3219 || TYPE_CODE (type) == TYPE_CODE_UNION);
3223 ia64_extract_return_value (struct type *type, struct regcache *regcache,
3226 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3227 struct type *float_elt_type;
3229 float_elt_type = is_float_or_hfa_type (type);
3230 if (float_elt_type != NULL)
3232 gdb_byte from[MAX_REGISTER_SIZE];
3234 int regnum = IA64_FR8_REGNUM;
3235 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3239 regcache_cooked_read (regcache, regnum, from);
3240 convert_typed_floating (from, ia64_ext_type (gdbarch),
3241 (char *)valbuf + offset, float_elt_type);
3242 offset += TYPE_LENGTH (float_elt_type);
3246 else if (!ia64_struct_type_p (type) && TYPE_LENGTH (type) < 8)
3248 /* This is an integral value, and its size is less than 8 bytes.
3249 These values are LSB-aligned, so extract the relevant bytes,
3250 and copy them into VALBUF. */
3251 /* brobecker/2005-12-30: Actually, all integral values are LSB aligned,
3252 so I suppose we should also add handling here for integral values
3253 whose size is greater than 8. But I wasn't able to create such
3254 a type, neither in C nor in Ada, so not worrying about these yet. */
3255 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3258 regcache_cooked_read_unsigned (regcache, IA64_GR8_REGNUM, &val);
3259 store_unsigned_integer (valbuf, TYPE_LENGTH (type), byte_order, val);
3265 int regnum = IA64_GR8_REGNUM;
3266 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3267 int n = TYPE_LENGTH (type) / reglen;
3268 int m = TYPE_LENGTH (type) % reglen;
3273 regcache_cooked_read_unsigned (regcache, regnum, &val);
3274 memcpy ((char *)valbuf + offset, &val, reglen);
3281 regcache_cooked_read_unsigned (regcache, regnum, &val);
3282 memcpy ((char *)valbuf + offset, &val, m);
3288 ia64_store_return_value (struct type *type, struct regcache *regcache,
3289 const gdb_byte *valbuf)
3291 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3292 struct type *float_elt_type;
3294 float_elt_type = is_float_or_hfa_type (type);
3295 if (float_elt_type != NULL)
3297 gdb_byte to[MAX_REGISTER_SIZE];
3299 int regnum = IA64_FR8_REGNUM;
3300 int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type);
3304 convert_typed_floating ((char *)valbuf + offset, float_elt_type,
3305 to, ia64_ext_type (gdbarch));
3306 regcache_cooked_write (regcache, regnum, to);
3307 offset += TYPE_LENGTH (float_elt_type);
3315 int regnum = IA64_GR8_REGNUM;
3316 int reglen = TYPE_LENGTH (register_type (gdbarch, IA64_GR8_REGNUM));
3317 int n = TYPE_LENGTH (type) / reglen;
3318 int m = TYPE_LENGTH (type) % reglen;
3323 memcpy (&val, (char *)valbuf + offset, reglen);
3324 regcache_cooked_write_unsigned (regcache, regnum, val);
3331 memcpy (&val, (char *)valbuf + offset, m);
3332 regcache_cooked_write_unsigned (regcache, regnum, val);
3337 static enum return_value_convention
3338 ia64_return_value (struct gdbarch *gdbarch, struct value *function,
3339 struct type *valtype, struct regcache *regcache,
3340 gdb_byte *readbuf, const gdb_byte *writebuf)
3342 int struct_return = ia64_use_struct_convention (valtype);
3344 if (writebuf != NULL)
3346 gdb_assert (!struct_return);
3347 ia64_store_return_value (valtype, regcache, writebuf);
3350 if (readbuf != NULL)
3352 gdb_assert (!struct_return);
3353 ia64_extract_return_value (valtype, regcache, readbuf);
3357 return RETURN_VALUE_STRUCT_CONVENTION;
3359 return RETURN_VALUE_REGISTER_CONVENTION;
3363 is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
3365 switch (TYPE_CODE (t))
3369 return TYPE_LENGTH (*etp) == TYPE_LENGTH (t);
3376 case TYPE_CODE_ARRAY:
3378 is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)),
3381 case TYPE_CODE_STRUCT:
3385 for (i = 0; i < TYPE_NFIELDS (t); i++)
3386 if (!is_float_or_hfa_type_recurse
3387 (check_typedef (TYPE_FIELD_TYPE (t, i)), etp))
3398 /* Determine if the given type is one of the floating point types or
3399 and HFA (which is a struct, array, or combination thereof whose
3400 bottom-most elements are all of the same floating point type). */
3402 static struct type *
3403 is_float_or_hfa_type (struct type *t)
3405 struct type *et = 0;
3407 return is_float_or_hfa_type_recurse (t, &et) ? et : 0;
3411 /* Return 1 if the alignment of T is such that the next even slot
3412 should be used. Return 0, if the next available slot should
3413 be used. (See section 8.5.1 of the IA-64 Software Conventions
3414 and Runtime manual). */
3417 slot_alignment_is_next_even (struct type *t)
3419 switch (TYPE_CODE (t))
3423 if (TYPE_LENGTH (t) > 8)
3427 case TYPE_CODE_ARRAY:
3429 slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t)));
3430 case TYPE_CODE_STRUCT:
3434 for (i = 0; i < TYPE_NFIELDS (t); i++)
3435 if (slot_alignment_is_next_even
3436 (check_typedef (TYPE_FIELD_TYPE (t, i))))
3445 /* Attempt to find (and return) the global pointer for the given
3448 This is a rather nasty bit of code searchs for the .dynamic section
3449 in the objfile corresponding to the pc of the function we're trying
3450 to call. Once it finds the addresses at which the .dynamic section
3451 lives in the child process, it scans the Elf64_Dyn entries for a
3452 DT_PLTGOT tag. If it finds one of these, the corresponding
3453 d_un.d_ptr value is the global pointer. */
3456 ia64_find_global_pointer_from_dynamic_section (struct gdbarch *gdbarch,
3459 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3460 struct obj_section *faddr_sect;
3462 faddr_sect = find_pc_section (faddr);
3463 if (faddr_sect != NULL)
3465 struct obj_section *osect;
3467 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3469 if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
3473 if (osect < faddr_sect->objfile->sections_end)
3475 CORE_ADDR addr, endaddr;
3477 addr = obj_section_addr (osect);
3478 endaddr = obj_section_endaddr (osect);
3480 while (addr < endaddr)
3486 status = target_read_memory (addr, buf, sizeof (buf));
3489 tag = extract_signed_integer (buf, sizeof (buf), byte_order);
3491 if (tag == DT_PLTGOT)
3493 CORE_ADDR global_pointer;
3495 status = target_read_memory (addr + 8, buf, sizeof (buf));
3498 global_pointer = extract_unsigned_integer (buf, sizeof (buf),
3502 return global_pointer;
3515 /* Attempt to find (and return) the global pointer for the given
3516 function. We first try the find_global_pointer_from_solib routine
3517 from the gdbarch tdep vector, if provided. And if that does not
3518 work, then we try ia64_find_global_pointer_from_dynamic_section. */
3521 ia64_find_global_pointer (struct gdbarch *gdbarch, CORE_ADDR faddr)
3523 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3526 if (tdep->find_global_pointer_from_solib)
3527 addr = tdep->find_global_pointer_from_solib (gdbarch, faddr);
3529 addr = ia64_find_global_pointer_from_dynamic_section (gdbarch, faddr);
3533 /* Given a function's address, attempt to find (and return) the
3534 corresponding (canonical) function descriptor. Return 0 if
3537 find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
3539 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3540 struct obj_section *faddr_sect;
3542 /* Return early if faddr is already a function descriptor. */
3543 faddr_sect = find_pc_section (faddr);
3544 if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0)
3547 if (faddr_sect != NULL)
3549 struct obj_section *osect;
3550 ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
3552 if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
3556 if (osect < faddr_sect->objfile->sections_end)
3558 CORE_ADDR addr, endaddr;
3560 addr = obj_section_addr (osect);
3561 endaddr = obj_section_endaddr (osect);
3563 while (addr < endaddr)
3569 status = target_read_memory (addr, buf, sizeof (buf));
3572 faddr2 = extract_signed_integer (buf, sizeof (buf), byte_order);
3574 if (faddr == faddr2)
3584 /* Attempt to find a function descriptor corresponding to the
3585 given address. If none is found, construct one on the
3586 stack using the address at fdaptr. */
3589 find_func_descr (struct regcache *regcache, CORE_ADDR faddr, CORE_ADDR *fdaptr)
3591 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3592 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3595 fdesc = find_extant_func_descr (gdbarch, faddr);
3599 ULONGEST global_pointer;
3605 global_pointer = ia64_find_global_pointer (gdbarch, faddr);
3607 if (global_pointer == 0)
3608 regcache_cooked_read_unsigned (regcache,
3609 IA64_GR1_REGNUM, &global_pointer);
3611 store_unsigned_integer (buf, 8, byte_order, faddr);
3612 store_unsigned_integer (buf + 8, 8, byte_order, global_pointer);
3614 write_memory (fdesc, buf, 16);
3620 /* Use the following routine when printing out function pointers
3621 so the user can see the function address rather than just the
3622 function descriptor. */
3624 ia64_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
3625 struct target_ops *targ)
3627 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3628 struct obj_section *s;
3631 s = find_pc_section (addr);
3633 /* check if ADDR points to a function descriptor. */
3634 if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
3635 return read_memory_unsigned_integer (addr, 8, byte_order);
3637 /* Normally, functions live inside a section that is executable.
3638 So, if ADDR points to a non-executable section, then treat it
3639 as a function descriptor and return the target address iff
3640 the target address itself points to a section that is executable.
3641 Check first the memory of the whole length of 8 bytes is readable. */
3642 if (s && (s->the_bfd_section->flags & SEC_CODE) == 0
3643 && target_read_memory (addr, buf, 8) == 0)
3645 CORE_ADDR pc = extract_unsigned_integer (buf, 8, byte_order);
3646 struct obj_section *pc_section = find_pc_section (pc);
3648 if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE))
3652 /* There are also descriptors embedded in vtables. */
3655 struct bound_minimal_symbol minsym;
3657 minsym = lookup_minimal_symbol_by_pc (addr);
3660 && is_vtable_name (MSYMBOL_LINKAGE_NAME (minsym.minsym)))
3661 return read_memory_unsigned_integer (addr, 8, byte_order);
3668 ia64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
3673 /* The default "allocate_new_rse_frame" ia64_infcall_ops routine for ia64. */
3676 ia64_allocate_new_rse_frame (struct regcache *regcache, ULONGEST bsp, int sof)
3678 ULONGEST cfm, pfs, new_bsp;
3680 regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
3682 new_bsp = rse_address_add (bsp, sof);
3683 regcache_cooked_write_unsigned (regcache, IA64_BSP_REGNUM, new_bsp);
3685 regcache_cooked_read_unsigned (regcache, IA64_PFS_REGNUM, &pfs);
3686 pfs &= 0xc000000000000000LL;
3687 pfs |= (cfm & 0xffffffffffffLL);
3688 regcache_cooked_write_unsigned (regcache, IA64_PFS_REGNUM, pfs);
3690 cfm &= 0xc000000000000000LL;
3692 regcache_cooked_write_unsigned (regcache, IA64_CFM_REGNUM, cfm);
3695 /* The default "store_argument_in_slot" ia64_infcall_ops routine for
3699 ia64_store_argument_in_slot (struct regcache *regcache, CORE_ADDR bsp,
3700 int slotnum, gdb_byte *buf)
3702 write_memory (rse_address_add (bsp, slotnum), buf, 8);
3705 /* The default "set_function_addr" ia64_infcall_ops routine for ia64. */
3708 ia64_set_function_addr (struct regcache *regcache, CORE_ADDR func_addr)
3710 /* Nothing needed. */
3714 ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
3715 struct regcache *regcache, CORE_ADDR bp_addr,
3716 int nargs, struct value **args, CORE_ADDR sp,
3717 int struct_return, CORE_ADDR struct_addr)
3719 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3720 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3725 int nslots, rseslots, memslots, slotnum, nfuncargs;
3728 CORE_ADDR funcdescaddr, global_pointer;
3729 CORE_ADDR func_addr = find_function_addr (function, NULL);
3733 /* Count the number of slots needed for the arguments. */
3734 for (argno = 0; argno < nargs; argno++)
3737 type = check_typedef (value_type (arg));
3738 len = TYPE_LENGTH (type);
3740 if ((nslots & 1) && slot_alignment_is_next_even (type))
3743 if (TYPE_CODE (type) == TYPE_CODE_FUNC)
3746 nslots += (len + 7) / 8;
3749 /* Divvy up the slots between the RSE and the memory stack. */
3750 rseslots = (nslots > 8) ? 8 : nslots;
3751 memslots = nslots - rseslots;
3753 /* Allocate a new RSE frame. */
3754 regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
3755 tdep->infcall_ops.allocate_new_rse_frame (regcache, bsp, rseslots);
3757 /* We will attempt to find function descriptors in the .opd segment,
3758 but if we can't we'll construct them ourselves. That being the
3759 case, we'll need to reserve space on the stack for them. */
3760 funcdescaddr = sp - nfuncargs * 16;
3761 funcdescaddr &= ~0xfLL;
3763 /* Adjust the stack pointer to it's new value. The calling conventions
3764 require us to have 16 bytes of scratch, plus whatever space is
3765 necessary for the memory slots and our function descriptors. */
3766 sp = sp - 16 - (memslots + nfuncargs) * 8;
3767 sp &= ~0xfLL; /* Maintain 16 byte alignment. */
3769 /* Place the arguments where they belong. The arguments will be
3770 either placed in the RSE backing store or on the memory stack.
3771 In addition, floating point arguments or HFAs are placed in
3772 floating point registers. */
3774 floatreg = IA64_FR8_REGNUM;
3775 for (argno = 0; argno < nargs; argno++)
3777 struct type *float_elt_type;
3780 type = check_typedef (value_type (arg));
3781 len = TYPE_LENGTH (type);
3783 /* Special handling for function parameters. */
3785 && TYPE_CODE (type) == TYPE_CODE_PTR
3786 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
3788 gdb_byte val_buf[8];
3789 ULONGEST faddr = extract_unsigned_integer (value_contents (arg),
3791 store_unsigned_integer (val_buf, 8, byte_order,
3792 find_func_descr (regcache, faddr,
3794 if (slotnum < rseslots)
3795 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3798 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3805 /* Skip odd slot if necessary... */
3806 if ((slotnum & 1) && slot_alignment_is_next_even (type))
3812 gdb_byte val_buf[8];
3814 memset (val_buf, 0, 8);
3815 if (!ia64_struct_type_p (type) && len < 8)
3817 /* Integral types are LSB-aligned, so we have to be careful
3818 to insert the argument on the correct side of the buffer.
3819 This is why we use store_unsigned_integer. */
3820 store_unsigned_integer
3821 (val_buf, 8, byte_order,
3822 extract_unsigned_integer (value_contents (arg), len,
3827 /* This is either an 8bit integral type, or an aggregate.
3828 For 8bit integral type, there is no problem, we just
3829 copy the value over.
3831 For aggregates, the only potentially tricky portion
3832 is to write the last one if it is less than 8 bytes.
3833 In this case, the data is Byte0-aligned. Happy news,
3834 this means that we don't need to differentiate the
3835 handling of 8byte blocks and less-than-8bytes blocks. */
3836 memcpy (val_buf, value_contents (arg) + argoffset,
3837 (len > 8) ? 8 : len);
3840 if (slotnum < rseslots)
3841 tdep->infcall_ops.store_argument_in_slot (regcache, bsp,
3844 write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8);
3851 /* Handle floating point types (including HFAs). */
3852 float_elt_type = is_float_or_hfa_type (type);
3853 if (float_elt_type != NULL)
3856 len = TYPE_LENGTH (type);
3857 while (len > 0 && floatreg < IA64_FR16_REGNUM)
3859 gdb_byte to[MAX_REGISTER_SIZE];
3860 convert_typed_floating (value_contents (arg) + argoffset,
3862 ia64_ext_type (gdbarch));
3863 regcache_cooked_write (regcache, floatreg, to);
3865 argoffset += TYPE_LENGTH (float_elt_type);
3866 len -= TYPE_LENGTH (float_elt_type);
3871 /* Store the struct return value in r8 if necessary. */
3874 regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM,
3875 (ULONGEST) struct_addr);
3878 global_pointer = ia64_find_global_pointer (gdbarch, func_addr);
3880 if (global_pointer != 0)
3881 regcache_cooked_write_unsigned (regcache, IA64_GR1_REGNUM, global_pointer);
3883 /* The following is not necessary on HP-UX, because we're using
3884 a dummy code sequence pushed on the stack to make the call, and
3885 this sequence doesn't need b0 to be set in order for our dummy
3886 breakpoint to be hit. Nonetheless, this doesn't interfere, and
3887 it's needed for other OSes, so we do this unconditionaly. */
3888 regcache_cooked_write_unsigned (regcache, IA64_BR0_REGNUM, bp_addr);
3890 regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
3892 tdep->infcall_ops.set_function_addr (regcache, func_addr);
3897 static const struct ia64_infcall_ops ia64_infcall_ops =
3899 ia64_allocate_new_rse_frame,
3900 ia64_store_argument_in_slot,
3901 ia64_set_function_addr
3904 static struct frame_id
3905 ia64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
3907 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3911 get_frame_register (this_frame, sp_regnum, buf);
3912 sp = extract_unsigned_integer (buf, 8, byte_order);
3914 get_frame_register (this_frame, IA64_BSP_REGNUM, buf);
3915 bsp = extract_unsigned_integer (buf, 8, byte_order);
3917 if (gdbarch_debug >= 1)
3918 fprintf_unfiltered (gdb_stdlog,
3919 "dummy frame id: code %s, stack %s, special %s\n",
3920 paddress (gdbarch, get_frame_pc (this_frame)),
3921 paddress (gdbarch, sp), paddress (gdbarch, bsp));
3923 return frame_id_build_special (sp, get_frame_pc (this_frame), bsp);
3927 ia64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
3929 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3931 CORE_ADDR ip, psr, pc;
3933 frame_unwind_register (next_frame, IA64_IP_REGNUM, buf);
3934 ip = extract_unsigned_integer (buf, 8, byte_order);
3935 frame_unwind_register (next_frame, IA64_PSR_REGNUM, buf);
3936 psr = extract_unsigned_integer (buf, 8, byte_order);
3938 pc = (ip & ~0xf) | ((psr >> 41) & 3);
3943 ia64_print_insn (bfd_vma memaddr, struct disassemble_info *info)
3945 info->bytes_per_line = SLOT_MULTIPLIER;
3946 return print_insn_ia64 (memaddr, info);
3949 /* The default "size_of_register_frame" gdbarch_tdep routine for ia64. */
3952 ia64_size_of_register_frame (struct frame_info *this_frame, ULONGEST cfm)
3954 return (cfm & 0x7f);
3957 static struct gdbarch *
3958 ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3960 struct gdbarch *gdbarch;
3961 struct gdbarch_tdep *tdep;
3963 /* If there is already a candidate, use it. */
3964 arches = gdbarch_list_lookup_by_info (arches, &info);
3966 return arches->gdbarch;
3968 tdep = XCNEW (struct gdbarch_tdep);
3969 gdbarch = gdbarch_alloc (&info, tdep);
3971 tdep->size_of_register_frame = ia64_size_of_register_frame;
3973 /* According to the ia64 specs, instructions that store long double
3974 floats in memory use a long-double format different than that
3975 used in the floating registers. The memory format matches the
3976 x86 extended float format which is 80 bits. An OS may choose to
3977 use this format (e.g. GNU/Linux) or choose to use a different
3978 format for storing long doubles (e.g. HPUX). In the latter case,
3979 the setting of the format may be moved/overridden in an
3980 OS-specific tdep file. */
3981 set_gdbarch_long_double_format (gdbarch, floatformats_i387_ext);
3983 set_gdbarch_short_bit (gdbarch, 16);
3984 set_gdbarch_int_bit (gdbarch, 32);
3985 set_gdbarch_long_bit (gdbarch, 64);
3986 set_gdbarch_long_long_bit (gdbarch, 64);
3987 set_gdbarch_float_bit (gdbarch, 32);
3988 set_gdbarch_double_bit (gdbarch, 64);
3989 set_gdbarch_long_double_bit (gdbarch, 128);
3990 set_gdbarch_ptr_bit (gdbarch, 64);
3992 set_gdbarch_num_regs (gdbarch, NUM_IA64_RAW_REGS);
3993 set_gdbarch_num_pseudo_regs (gdbarch,
3994 LAST_PSEUDO_REGNUM - FIRST_PSEUDO_REGNUM);
3995 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
3996 set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM);
3998 set_gdbarch_register_name (gdbarch, ia64_register_name);
3999 set_gdbarch_register_type (gdbarch, ia64_register_type);
4001 set_gdbarch_pseudo_register_read (gdbarch, ia64_pseudo_register_read);
4002 set_gdbarch_pseudo_register_write (gdbarch, ia64_pseudo_register_write);
4003 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, ia64_dwarf_reg_to_regnum);
4004 set_gdbarch_register_reggroup_p (gdbarch, ia64_register_reggroup_p);
4005 set_gdbarch_convert_register_p (gdbarch, ia64_convert_register_p);
4006 set_gdbarch_register_to_value (gdbarch, ia64_register_to_value);
4007 set_gdbarch_value_to_register (gdbarch, ia64_value_to_register);
4009 set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
4011 set_gdbarch_return_value (gdbarch, ia64_return_value);
4013 set_gdbarch_memory_insert_breakpoint (gdbarch,
4014 ia64_memory_insert_breakpoint);
4015 set_gdbarch_memory_remove_breakpoint (gdbarch,
4016 ia64_memory_remove_breakpoint);
4017 set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc);
4018 set_gdbarch_breakpoint_kind_from_pc (gdbarch, ia64_breakpoint_kind_from_pc);
4019 set_gdbarch_read_pc (gdbarch, ia64_read_pc);
4020 set_gdbarch_write_pc (gdbarch, ia64_write_pc);
4022 /* Settings for calling functions in the inferior. */
4023 set_gdbarch_push_dummy_call (gdbarch, ia64_push_dummy_call);
4024 tdep->infcall_ops = ia64_infcall_ops;
4025 set_gdbarch_frame_align (gdbarch, ia64_frame_align);
4026 set_gdbarch_dummy_id (gdbarch, ia64_dummy_id);
4028 set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
4029 #ifdef HAVE_LIBUNWIND_IA64_H
4030 frame_unwind_append_unwinder (gdbarch,
4031 &ia64_libunwind_sigtramp_frame_unwind);
4032 frame_unwind_append_unwinder (gdbarch, &ia64_libunwind_frame_unwind);
4033 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4034 libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
4036 frame_unwind_append_unwinder (gdbarch, &ia64_sigtramp_frame_unwind);
4038 frame_unwind_append_unwinder (gdbarch, &ia64_frame_unwind);
4039 frame_base_set_default (gdbarch, &ia64_frame_base);
4041 /* Settings that should be unnecessary. */
4042 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
4044 set_gdbarch_print_insn (gdbarch, ia64_print_insn);
4045 set_gdbarch_convert_from_func_ptr_addr (gdbarch,
4046 ia64_convert_from_func_ptr_addr);
4048 /* The virtual table contains 16-byte descriptors, not pointers to
4050 set_gdbarch_vtable_function_descriptors (gdbarch, 1);
4052 /* Hook in ABI-specific overrides, if they have been registered. */
4053 gdbarch_init_osabi (info, gdbarch);
4058 extern initialize_file_ftype _initialize_ia64_tdep; /* -Wmissing-prototypes */
4061 _initialize_ia64_tdep (void)
4063 gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);